delay attribution principles and rules supplementary information

Delay Attribution Board
Floor 8
1 Eversholt Street
London
NW1 2DN
DELAY ATTRIBUTION PRINCIPLES AND RULES
SUPPLEMENTARY INFORMATION
The content from this point is a supplement to the Delay Attribution Principles and Rules
Delay Attribution Principles and Rules
June 2017
Page Supp1
Delay Attribution Board
Floor 8
1 Eversholt Street
London
NW1 2DN
Delay Attribution Board Members and Representation
Franchised Passenger Class Band 1
Govia Thameslink Railway
Abellio ScotRail
West Coast Trains
Franchised Passenger Class Band 2
Abellio Greater Anglia
CrossCountry Trains
First Greater Western
Franchised Passenger Class Band 3
Arriva Rail London
Arriva Rail Northern
Arriva Trains Wales Ltd
Chiltern Railway Company
East Midlands Trains
First TransPennine Express
Non-Franchised Passenger Class
DB Regio Tyne and Wear
East Coast Trains
Eurostar International
Grand Central Railway Company
DAB
Representative
Rebecca Holding
London & Birmingham Railway
Stagecoach South Western Trains
Virgin Trains East Coast Main Line
Jim Pepper
London & South Eastern Railway
Merseyrail Electrics
MTR Crossrail
NXET Trains
Serco Caledonian Sleepers
Alistair Rutter
Heathrow Express
Hull Trains Company
North Yorkshire Moors Railway
Rail Express Systems
West Coast Railway Company
Jonathan Seagar
Non-Passenger Class companies - Band 1
DB Cargo
Freightliner
Non-Passenger Class companies - Band 2
COLAS Rail Ltd
Harsco Rail
Devon and Cornwall Railways
Rail Operations Group
Direct Rail Services
RVEL
Freightliner Heavy Haul
Victa Railfreight
GB Railfreight
Network Rail
Non-Voting Members
Delay Attribution Principles and Rules
Nigel Oatway
(Deputy Chair)
Neil Dodd
Alex Kenney
Andrew Rowe
Andriana Shiakallis
John Thomlinson
Carew Satchwell
Darran Broderick
Chairman: Richard Morris
Secretary: Mark Southon
June 2017
Page Supp2
TRAIN OPERATING COMPANY AND NETWORK RAIL BUSINESS CODES
Operating Company
Business Operating Company
Code
Business
Code
Abellio Greater Anglia
EB
Govia Thameslink Railway
ET
Abellio Scotrail
HA
Grand Central Trains
EC
Amey Infrastructure Services
RE
Harsco Rail
RT
Arriva Rail London
EK
Heathrow Connect
EE
Arriva Rail Northern
ED
Heathrow Express
HM
Arriva Trains Wales
HL
Island Lines
HZ
Balfour Beatty Rail Plant
RZ
London Midland
EJ
NXET (C2C)
HT
LUL Bakerloo Line
XC
Caledonian Sleeper
ES
LUL District Line – Wimbledon
XB
Chiltern Railway
HO
LUL District Line – Richmond
XE
Colas Rail
RG
Merseyrail
HE
Cross Country Trains
EH
MTR Crossrail
EX
DB Regio Tyne and Wear Metro
PG
North Yorkshire Moors Railway PR
DB Cargo
WA
Rail Express Systems
WA
Devon and Cornwall Railway
EN
SB(Swietelsky Babcock)Rail
RD
Direct Rail Services
XH
Serco Rail Maintenance
RS
East Midlands Trains
EM
South West Trains
HY
Eurostar International
GA
Southeastern
HU
Great Western Railway
EF
Victa Railfreight
PV
First Hull Trains
PF
Virgin East Coast
HB
First Transpennine Express
EA
Virgin Trains West Coast
HF
Freightliner Heavy Haul
DB
Volker Rail
RH
Freightliner Intermodal
DB
West Coast Railway Co.
PA
GB Railfreight
PE
Network Rail – Route Business Codes
Network Rail Route
Business
Code
Network Rail Route
Business
Code
Anglia
QH
South East Kent/Sussex
QM/QB
London North Eastern
QG
Wales
QW
London North Western
QR
Wessex
QC
Scotland
QL
Western
QD
Delay Attribution Principles and Rules
June 2017
Page Supp3
Delay Attribution Board Process and Guidance Documents
PGD1 – PRIME Cause definition / Examples
This Process Guide formally defines the term ‘Prime Cause’ (added to the April 2016 DAG)
It is supported with examples of application by a number of common scenarios that should be used
for briefing or referencing.
PGD2 – Reactionary Delay Attribution Examples
This Process Guide contains explanations on how to allocate reactionary delays being a critical
element of the attribution process. They are demonstrated with worked examples for what are
considered the most common scenarios.
PGD3 – Y code application
This Guide was derived from the brief that supported the Y code changes for the April 2015 DAG.
It contains descriptions of all the Y codes and examples of usage.
PGD4 – Dispute and Resolution Process Guide
This Guidance Process was designed for Operators and Network Rail Routes covering disputes and
resolution principles to enable timely attribution and resolution.
PGD5 – Delay Management TIN reattribution process
This Process Guide was designed for the reattribution of Management TINs including appropriate
actions and timescales. It sets out there needs to be a common understanding of communication
requirements between parties.
PGD6 – Joint Responsibility
This Guidance Document sets out what does and doesn’t constitute Joint Responsibility and provides
a reference table for the attribution of individual trains when joint responsibility criteria has been
determined. Additionally it sets out some common examples of when Joint Responsibility does and
doesn’t apply to aid understanding.
PGD7 – Holding Code
This guidance document sets out the appropriate use and processes to be applied by all Parties
when considering an incident for Holding Code status.
It prescribes what scenarios should and shouldn’t be considered for a Holding Code and covers the
process to follow should a Holding Code be agreed
PGD8 – Delay Allocation Entering and Leaving the network
This guidance document covers various scenarios, in diagrammatic form, of delays caused to trains
waiting to enter or leave the Network Rail network.
PGD9 – Delay Allocation Managing Freight Services
This guidance document covers various scenarios of freight trains retimed / rescheduled under the
Managing Freight Services during Disruption (MFSdD) Control instructions and the attribution of any
subsequent delays.
PGD10 – Permissive Working
This guidance document covers various scenarios relating to the process of ‘calling-on’ at stations
and the relevant responsibility of each scenario. It particularly covers the principle that station staff
communication with the Signaller is seen as acting as an agent to Network Rail in the same vein that
a member of platform staff dispatching another TOCs service is seen.
Delay Attribution Principles and Rules
June 2017
Page Supp4
PGD11 – Queue of Trains
This guidance document provides improved understanding on the allocation of delays for trains in a
stationary (and moving) queue of trains.
PGD12 – Uninvestigated and Unxplained
This guidance document supports the amendments to the Z Codes (reclassification of ZW, ZX, ZY and
ZZ and introduction of ZS and ZU) as well as the two new Delay Codes R8 and T8.
It sets out the appropriate use of these Delay Codes, supported by process guidance in relation to
the investigation and resolution of delays deemed unexplained or uninvestigated.
PGD13 - Fatalities
This guidance document supports and builds on PGD6 and specifically covers fatalities being an area
cited by Industry as in most need of improved guidance supported with flow diagrams and further
example incidents specific to fatalities.
ALL THE PROCESS AND GUIDANCE DOCUMENTS CAN BE FOUND ON THE DAB WEBSITE
http://www.delayattributionboard.co.uk/DAB%20Process%20and%20Guidance%20documents.html
Delay Attribution Principles and Rules
June 2017
Page Supp5
DELAY ATTRIBUTION PRINCIPLES AND RULES JUNE 2017 INDEX
Subject
3rd rail failure or defect
3rd rail obstruction reason unknown
3rd rail shoe beam faults on passenger trains
3rd rail switches,breakers,feeders or irregularities
3rd rail trips vegetation
ABS brake and Brake system faults including wheel flats on train
Absolute block failure
AC/DC trip when cause not known
Acceptance yard/siding (reactionary)
Acceptance yard/siding early running off network (PGD8)
Acceptance yard/siding include adjacent off network incident (PGD8)
Acceptance yard/siding Network Rail infrastructure defect
Acceptance yard/siding no information provided
Acceptance yard/siding off network freight terminals or yards
Accepted design limitations (ADL) operational constraints
ACI GSM-R ARS incorrect Rep No or berth
ADD activations on passenger trains
ADD Automatic dropper device no fault found (train operator)
ADD Automatic dropper device on OHLE electric traction.
Adhesion autumn leaf fall reactionary delays additional guidance
Adhesion contamination of railhead after spillage from train
Adhesion equipment failure, on train during autumn
Adhesion not autumn grease from flanger or railhead needs cleaning
Adhesion problems due to leaf fall contamination during autumn
Adjusting loaded wagons,loading incident or open door
ADL box instructions signaller unable to mitigate
ADL causes an infrastructure failure
ADL causes no failure but still causes delay for further investigation
ADL in box instructions signaller can mitigate
ADL is not included in box instructions
ADL train schedule not taken into consideration
Air conditioning technical faults above solebar on a passenger train
Air systems technical faults below solebar on a passenger train
Airport emergency rail network closed
Animal behaviour damage due to chronic repeated infestation
Animal damage to infrastructure after removal requires work
Animal damage to infrastructure removal rectifies without work
Animal incursion not safety of line subsequent trains
Animal incursion reported as safety of the line (Q1.7)
Animal incursion reported by driver not safety of line.The reporting train
Animal infestation
Animal strike flow chart
Animal sudden impact the animal not present at failure point
Applicable timetable (ATT) the agreed train plan for the day
ARS controlled areas regulation. Flow chart
ARS failure
ARS GSM-R ACI incorrect Rep No or berth
ARS software excluding schedule issue
Assault at a station
Assault on passenger
Asset overwhelmed weather
ATP no fault found train operator
ATP or AWS failure with lineside equipment
ATP train borne safety system faults on passenger trains. Not cab
Attaching vehicles station operating
Attribution examples
Attribution guide, the need for
Automatic reporting SMART berth errors
Autumn actions to mitigation.
Autumn adhesion equipment failure on a train
Delay Attribution Principles and Rules
June 2017
Clause
O1.11
O1.11
G1.2.a
O1.11
O1.11
G1.2.h
Si
O4.2.b
H2.2.e
H2.2.d
H2.2.b
H2.2.a
H2.2.c
H2
O1.15
G5.2.l
G1.2.a
R3.5
O4.2.e
F1.8
F1.7.3.b
F1.7.2.a
F1.7.3.a
F1.7.1.d
Sa
O1.15.d
O1.15.a
O1.15.b
O1.15.c
O1.15.e
O1.15.f
G1.2.d
G1.2.e
R1.3.w
Q1.1
Q1.3
Q1.2
Q1.8.1.c
Q1.8.1.a
Q1.8.1.b
Q1.1
Q1.7
Q1.4
C1.5
K9
Si
G5.2.l
So
N2.y
R1.3.i
Q5.9
R3.5
Si
G1.2.f
Sr
B6.17
A1
E3
F1.4.3
F1.7.2.a
Specific Codes
I1
I2
M1
I4
JP
MN
IG
I2
Y*
OB
A*/F*/M*
I*/J*/X*
AA
OH
M1
M1
M1
M*
M*
IZ
QH
AG
I*/J*
I*/J*
OC
I*/J*
QA/QM
M8
MD
XZ
I*/J*
I*/J*
X8
OC
I8/X8
FC/TG
I*/J*
I8/FZ/MB/MQ/V8/VZ/X8
I8
IF
OH
OH
VA
VB
XT
M9
IJ
MT
RD
PT
M*
Index page 1 of 22
Subject
Autumn application of attribution process
Autumn attribution. Joint process Chart 1
Autumn cautioning trains when contamination present
Autumn concept of neutral zone
Autumn contamination agreed vegetation measures not completed
Autumn contamination but agreed vegetation measures completed
Autumn delays not on jointly agreed neutral zone list.
Autumn failure to operate agreed railhead treatment program (F2)
Autumn jointly agreed neutral zones
Autumn leaf fall reactionary delays additional guidance
Autumn minutes in excess of agreed reasonable time loss in section
Autumn neutral zone incidents, the use of
Autumn principles
Autumn railhead conditioning train delays (RHC) including reactionary
Autumn railhead examination failure to carry out after ERHC/LRA
Autumn railhead manual treatment (F2)
Autumn railhead treatment not applied at planned locations
Autumn railhead treatment principles
Autumn reasonable level of time loss neutral zone
Autumn review of neutral zone
Autumn setting up neutral zone incidents.
Autumn SPAD or station overshoot at ERHC published site
Autumn special working for leaf fall track circuit operation
AWS no fault found train operator
AWS or ATP failure with lineside equipment
AWS train borne safety system faults on passenger trains. Not cab
Balise activated train borne systems on passenger trains
Balise ERTMS or ETCS
Balise TASS
Bank holiday planned cancellation (C2.8)
Barrow crossing failure
Basis of attribution
Batteries technical faults below solebar on passenger trains
Below threshold delays introduction
Below threshold delays sub threshold
Below threshold delays. Statement of good practice (PGD12)
Below threshold reaction P coded TSR incident
Berth errors automatic reporting SMART
Best endeavours regulation decision
Bicycles loading,unloading.Reserved presented late or not reserved
Birds strike including definition of size relating to pheasant
Blanket speed restriction for extreme heat, wind per group standards
Block failure
Blown fuse 110v or 650v
Boards defective or blown down
Booked train crew not available service recovery (reactionary)
Booking on duty train crew
Box instructions ADL is not included
Box instructions ADL signaller can mitigate
Box instructions ADL signaller unable to mitigate
Brake and brake system faults including wheel flats on a train
Brake tests running due to weather
Branches overhead striking not due to weather
Breached sea defence not weather
Bridge strikes involving road or waterborne vehicles
Bridge strikes rail vehicle (P1/P2)
Bridges structural
Broken rail originally reported as a track circuit failure (TCF)
Broken windows technical faults above solebar on a train not external
Buckled rails including high temperature
Buildings encroaching NR infrastructure not weather or vandalism.
Buildings structural problems
Delay Attribution Principles and Rules
June 2017
Clause
F1.3
F1.6.1
F1.7.1.g
F1.5.1
F1.7.1.e
F1.7.1.d
F1.6
F1.7.1.a
F1.4.1
F1.8
F1.7.2.c
F1.5.2
F1.4
F1.7.1.c
F1.7.1.f
F1.7.4
F1.7.1.f
F1.7.5
F1.4.2
F1.4.4
F1.5.1
F1.7.2.b
F1.7.1.h
R3.5
Si
G1.2.f
G1.2.k
G3
G2
L1.5
Si
C1
G1.2.e
E4.1
B5.3
viii
E4.2
E3
K4
N2.l
Q1.6
Q5.4.f
Si
O1.5
O3
Sy
J2.1/2
O1.15.e
O1.15.c
O1.15.d
G1.2.h
Q5.12.e
F1.7.1.b
O1.2.i
Q2
Q2.1
O1.2.g
O1.3.a
G1.2.d
Q5.4.u
Sx
O1.2.g
Specific Codes
QI
JP
QH
TW/FG
OS
QI See 4.3.1.6.1/ 6.3
QI
TT
TG/FP
QJ
M9
IJ
MT
NA
IM/M0
NA/IM
PE/PG
ID
MD
JB
PT
OA
RR/RS
M*/I8/FZ/VZ/V8/X8
X4
IG
IH
IQ
YN
FE/TG/TH
I*/J*
OC
I*/J*
MN
VW/MW
JP
IV
XP
JD
IR
M8
IR
XO
JD
Index page 2 of 22
Subject
Bumps where cause unknown.
Cab heaters technical faults above solebar on a passenger train
Cab secure radio (CSR) no fault found train operator
Cab secure radio (CSR) off train legacy telecom equipment failures
Cab secure radio (CSR) train borne safety system within the cab
Cable failure due to vandalism
Cable fault
Cable vandalism or theft
Cancellation of a duplicate or erroneous schedule
Cancelled at train operators request passenger services
Cancelled due to planned engineering work
Cancelled freight including planned not to run or no specific reason
Categories of TRUST delay code and their default attribution
Catering loading supplies
Catering staff including trolleys
Cautioning of trains when contamination present during autumn
Change of aspects (COA) with no apparent cause
Channel tunnel international locomotive failure,defect or attention
Channel tunnel late ex Europe freight or passenger
Close Door(CD)/right away (RA) defect
Close Door(CD)/right away (RA) defect operator mitigation not made
Close Door(CD)/right away (RA) sunlight operator mitigation not made
Close Door(CD)/right away(RA)sun on equipment mitigation in place
Coaching stock delays on passenger trains
Coaching stock on a freight train fault
Cold weather severe operating restrictions
Cold weather severe passenger charter excludable
Commencement board for TSR/ESR defective or down
Commercial agreement with no substantive delay reason
Communication cord or emergency train alarm pulled
Communication links between telecoms or signalling equipment
Concentrator System (CON) signalbox
Concert passengers joining or alighting. Special event
Condition of bridge temporary speed restriction (COB TSR)
Condition of track temporary speed restriction (COT TSR)
Conductor rail becoming displaced
Conductor,senior conductor or train manager or train guard
Congestion yard or terminal off network
Connections from other transport modes
Connections not authorised
Connections TOC authorised but outside policy
Connections within policy (FOC) hourly frequency or less
Connections within policy (FOC) more frequently than hourly
Connections within policy not FOC)
Contamination of railhead after spillage from train
Contamination present agreed autumn vegetation measure completed
Contamination present cautioning of trains during autumn
Context of the principles and rules
Contingency plans and service recovery
Contractual exclusion
Control freight Operating Company (FOC) directive
Control Network Rail decision or directive
Control permissive working train longer than plan no advise (PGD10)
Control systems faults excluding track or driver based
Control train operating company (TOC) directive
Coupler and coupler system faults excluding track or driver based
Coupler no fault found after failure to couple train operator
Cover speed for track patrol unless published TSR
Cracked rail including broken, twisted, buckled or flawed
Crew doors delays associated with faults on doors
Crime at a station disorder,drunks,assaults,theft,vagrants
Critical Rail temperature speeds (CRT) other than buckled rails
Delay Attribution Principles and Rules
June 2017
Clause
Si
G1.2.d
R3.5
O1.8
G1.2.b
O1.2.b
O1.5
Q4.1.a
Sp
St
L1.5
I3
C2
St
N2.d
F1.7.1.g
R2.4.f
Sm
Sf/t
N2.ah
N2.ai
N2.ak
N2.aj
G1.2.n
G1.3.c
Q5.12
Q5.1
O3
Sq
Sv
O1.6
O1.7
N2.j
O2.4.g/h
O2.4.e/f
R1.3.e
St
Sa
Sr/t
N2.h
N2.g
N2.f
N2.f
N2.e
F1.7.3.b
F1.7.1.d
F1.7.1.g
A2
M1
Sp
Sf
So
K8.a
G1.2.i
St
G1.2.i
R3.5
P2.19.m
Si
G1.2.c
N2.y
Sj
Specific Codes
IT
M8
M9
I0
M0
XR/XB
IA/IB/IC/IE/II/IH/XK/X4
XR
PJ
TB
PE
FL
T4
TK
QI
IA
MF
FN/TN
IA
R1
R1
XU
ML
ML
V*/X*
IQ
QT
VH
IK
IK
R7
JD/PB
PB/JS
I1
TH
AE
RM/T3
RI
RK/TM
YL
OW
YL
M*
QH
QI
PZ
FZ
OD
OC/OD/OZ
MY
TR
MY
M*
I6
IR
M7
VA
JH
Index page 3 of 22
Subject
Cross boundary delays for VSTP
Cross boundary delays incorrect regulation
Cumulative sub threshold delays (D5.2)
Customer equipment breakdown or reduced capacity,off network
Customer information system failures (CIS / PIS)
Cuttings
Dangerous goods incident (DGI) or irregularity
Dangerous goods marshalling
Dangerous goods overloaded
DC/AC trip. 3rd rail or OHLE when cause not known
Defective traction or stock safety problem
Definitions. Prime cause,primary delay and reactionary delay.
De-icer (RHC) (MPV)
Delay attribution board (DAB)
Delay attribution process. Diagrammatic form
Delay investigation not made correctly mis-investigation
Delayed a train operators request passenger service
Delays not investigated by Network Rail
Depot fleet delays
Depot operating problem including non severe weather
Depot severe weather passenger fleet depot
Derived delays sub threshold
Derived power supply failure of traction power supply
Detaching vehicles station operating
Diesel hauled freight train faults
Different operator late start. Separate incident
Directive by train operating company
Disorder at a station
Dispatch incorrect by station staff
Dispatch train equipment failure Network Rail but not telecoms
Distribution network operator(DNO)/distribution point electrical supply
Divert at FOC request. Freight trains
Divert engineering work planned not timetabled out of ROR/EAS
Divert from booked route or line delayed by (reactionary)
Divert planned engineering work not timetabled within ROR/EAS
Diverted not included contingency plan no route knowledge
Diverted per pre arranged contingency plan,no route knowledge
DOO CCTV monitors,mirrors station platforms when NR telecoms
DOO monitors when Network Rail maintained
Door delays associated with faults on doors & associated systems
Door open on non passenger train
Door open on passenger train
Doors open freight
Drive train technical faults below solebar on a passenger train
Driver adhering to company professional driving standards or policy
Driver adhering to company professional driving standards weather
Driver freight or passenger operator
Driver GSM-R error including entering wrong registration code
Driver GSM-R fails to de register radio
Driver TPWS adhering to company professional driving standards
Drunks at a station
DSD train borne fault safety system within the cab passenger train
Duplicate delay excess minutes
Early running and out of path control agreement
Early running and out of path result of a known incident
Early running at request of driver or shunter that signaller agrees to
Early running regulation error at point of delay
Early running regulation not held at prior regulating point
Earth slip,subsidence or breached sea defences not weather on day
Earthworks temporary speed restriction (TSR)
Electric hauled freight train faults
Electric technical faults below solebar on a passenger train
Delay Attribution Principles and Rules
June 2017
Clause
B6.16
B6.15
E4.5
Sa
N2.r
O1.2.i
R1.3.a
I2.2.a
I1.2.a
O4.2.b
R2.4.j
B7
F2.2
A5
A1.1
E2.4
St
So
H1
Q5.4.c
Q5.4.k
B5.4
O1.5.b
Sr
G1.3.a
J1.2
St
N2.y
Sr
Sj
O1.5
Sf
Sq
Sy
Sp
M1.b
M1.a
O1.7
O1.13
G1.2.c
R1.3.l
R1.3.k
I1
G1.2.e
Sf/t
Q5.4.y
Sf/t
G5.2.f
G5.2.e
G6.1.b
N2.y
G1.2.b
E1
K7.c
K7.e
K7.d
K7.a
K7.b
Si
O2.4.i/j
G1.3.b
G1.2.e
Specific Codes
QN
OB
AH
RV
IV
FA
FA
FA
I2
M*
OB/OE/OS/QA/QM/QN
ON
TB
OU
FZ/I*/J*/TZ//YE/OB/X*
MU
VW
IH
RD
MC
TR
VA
R1
J2
IA/IB/IC/IE/II/IH/XK/X4
FK
QB
YP
PF
FH/TI
IK
IK
M7
FZ
M*/R*/T*/V*
AG
MD
FGTW
VR
FC/TG
FC/TG
FC/TG
TG/TW
VA
M0
PJ
OD
Y*
OC
OB
OC
IV
IV/PB
MB
MD
Index page 4 of 22
Subject
Electric train OHLE ADD
Electrical control room (ECR) (IVRS)
Electrical distribution supply chain or board national grid
Electrification
Embankments
Emergency possessions
Emergency speed restrictions (ESR) derailment
Emergency speed restrictions (ESR) infrastructure problem
Emergency speed restrictions (ESR) overview
Emergency speed restrictions (ESR) rolling contact fatigue or GCC
Emergency speed restrictions (ESR) work not completed
Emergency train alarm pulled (communication cord)
Encroaching objects NR infrastructure not weather or vandalism.
Engineering access statement temporary speed restrictions (TSR)
Engineering trains
Engineering trains incentivised performance scheme (P1)
Engineering work/divert SLW planned not timetabled out of ROR/EAS
Engineering work/divert SLW planned not timetabled within ROR/EAS
Engineers on track equipment
Engineers OTM failure or problem
Engines technical faults below solebar on a passenger train
Equipment breakdown/reduced capacity customer or yard off network
ERHC Railhead examination failure to carry out (F1.6)
Erroneous or duplicate schedule cancellation
ERTMS on board over riding driver command
ERTMS or ETCS failure,excluding communications links and balises
ERTMS or ETCS incorrect operation of on board equipment
ERTMS or ETCS no fault found train operator
ERTMS or ETCS Signaller wrong instructions
ERTMS or ETCS track mounted infrastructure balise system fails
ERTMS or ETCS train borne system fails
ERTMS train borne fault safety system within the cab passenger train
Escalator failure at a station including lifts
Evacuation due to fire alarm NR buildings not stations due to vandals
Evacuation Network Rail buildings other than stations not vandals
EWAT initiated by route controls. RED alert
Examination of railhead failure to carry out after ERHC/LRA
Examples of attribution
Exceptional loads (RT3973) train schedules
Excess minutes duplicate delay or excess minutes
Exclude from performance regime or contractually
Exclusion agreed between Network Rail and train operator
External causes other responsibility of Network Rail
External impact incidents animal incursions,strikes and infestations
External passenger charter excludable criteria due to weather (C2.6)
External passenger other responsibility of TOC
External power supply failure at a station
External supplier power failure
External trees, buildings, objects encroaching NR infrastructure
Extreme heat or wind,blanket speed per group standards
Failure mode equipment after possession
Failure of ERTMS or ETCS balise system
Failure of FOC owned infrastructure off network
Failure of RHC train
Failure to call or stop joint responsibility incidents (PGD6)
Failure to mitigate
Falling from a train onto platform fatality or injuries (PDG13)
Falling snow and fog regulations with semaphore signalling
False fire alarms.
Fatality including struck by train (PGD6/13))
Fencing adequately maintained vandalism and theft
Fire caused by a traction unit
Delay Attribution Principles and Rules
June 2017
Clause
O4.2.e
O1.9
O1.5
O1.11
O1.2.i
P2.3
O2.4.l
O2.4.k
O2
O2.4.m
O2.4.c
Sv
Sx
O2.4.f
P1
D3.1
Sq
Sp
P1
G1.4.c
G1.2.e
Sa
F1.7.1.f
Sp
St
O1.14
Sf
R3.5
So
G3.1.b
G3.1.a
G1.2.b
N2.q
Sx
So
Q5.1
F1.7.1.f
B6.17
L1.2.f/g
E2
C2.7/8
Sp
Sx
Q1
Q5.1
Sv
N2.t
O1.2.k
Sx
Q5.4.f
P2.8
G3
O1.12
F2.3.j
D2.9
D4
Q3.2.c
Q5.4.p
Q8.1.e-i
Q2.2
Q4.1.b
Q8.1.c
Specific Codes
M1
J0
IA/IB/IC/IE/II/IH/XK/X4
I1/I2/I4/JP
IV
I*/J*/Q*/X*
I*/J*
JS
JG
VH
XO
MV/I7/I5
QB
PF
MV/I7/I5
MV
MD
AH
QI
PJ
TS
J7
FI
M*
OC
IM
M0
M0
RE
XV
OV
V*/X*
QI See 4.3.1.6.1/ 6.2
QA/QM/FH/TA
PJ
P*
PL
XZ
I*/J*/X8
V*/X*
VZ
VZ
XK
XO
X4
I*/J*
IM/M0
AX
OM
VC
X1
AK/OJ/RH/VF/XB
XC/VC/AZ/FZ
XB
M*
Index page 5 of 22
Subject
Fire external not prevent passenger access to or from train at station
Fire fleet depot
Fire flowchart. Identifying attribution of various types of fire and alarms
Fire freight yard,terminal or private yard off network
Fire line side on Network Rail infrastructure.
Fire Network Rail buildings other than stations not vandal / vandal
Fire Network Rail managed stations definition (Q8.1)
Fire off network the effect of fire cautioning or stopping due to smoke
Fire on freight train
Fire on passenger train
Fire station buildings or platform affecting FOC trains booked to stop
Fire station buildings or platform failed to stop not vandalism
Fire station buildings or platform failed to stop vandalism
Fire station buildings or platform no train stops passengers not vandal
Fire station buildings or platform no train stops passengers vandalism
Fire station buildings or platform regular trains not call not vandalism
Fire station buildings or platform regular trains not call vandalism
Fire station false alarms
Fish plate defective
Flanger grease causing adhesion problems
Flawed rail
Fleet depot delays
Fleet problems weather non severe
Fleet problems weather severe
Fleet restriction snow or Ice
Flooding affecting other forms of transport
Flooding burst pipes out of Network Rails control
Flooding drainage inadequately maintained
Flooding due to weather further guidance (Q5.7)
Flooding flow chart for weather (Q5.6)
Flooding freight yard off network
Flooding not due to exceptional weather
Flooding obstructions on line including trees
Flooding station access passengers
Flooding station buildings
Flooding TOC/FOC restriction directive affecting traction
Fog and falling snow regulations, semaphore signalling
Fog semaphore signals visibility due to weather (Q5.12.b)
Foot crossing failure
Formal inquiry incident. Possible operator responsibility (R4)
Formal inquiry including OHLE Incident
Forms signaller completion of RT3185/7 trains overlooked
Freight adjusting loaded wagons, loading incident or open door
Freight diesel hauled train faults
Freight electric hauled train faults
Freight operating company cause to be specified or marshalling.
Freight operator unexplained believed to be due to operator (PGD12)
Freight overweight against the timing load
Freight planning issue including loco diagram or RT3973 not requested
Freight terminal or yards or none Network Rail operated Off Network
Freight train driver
Freight train held at FOC request Freight train
Freight train running at lower than planned classification or overweight
Freight train wagons or coaches fault
Frost flow chart weather, delay code guidance
Frost or Snow defective point heaters points failure
Frost,snow or ice non severe affecting infrastructure equipment
Frozen couplers mitigation not applied weather affecting the train
Functional supply points (FSP)
Fuse blown 110v or 650v
Gangway doors delays associated with faults on doors & associated
Gas,water mains or overhead power lines national grid
Delay Attribution Principles and Rules
June 2017
Clause
Q8.1.d
Q8.1.k
Q8.8
Q8.1.j
Q8.1.a
Q8.1.h
Q8.6
Q8.7
Q8.1.m
Q8.1.l
Q8.1.i
Q8.1.e
Q8.1.e
Q8.1.g
Q8.1.g
Q8.1.f
Q8.1.f
Q8.1.e
Si
F1.7.3.a
Si
H1
Q5.4.d
Q5.4.l
Q5.12.f
Q6.4.b
Q6.4.c
Q6.4.a
Q6
Q5.7
Q6.4.e
Sj
Q5.4.j
Q6.4.g
Q6.4.d
Q6.4.f
Q5.4.p
Q5.4.aa
Si
R1
O4.2.g
R2.5
Sa
G1.3.a
G1.3.b
Sa
E2
I1.2.b
Sf
H3
Sf
Sf
Sf
G1.3.c
Q5.9
Si
Si
G1.2.j
O1.5.b
O1.5
G1.2.c
Sx
Specific Codes
XL
VF/MU
AK/M*/O*/RH/VF/X*
AK
I9
OV / XV
XK
MD/M8/VF
MD/M8/VF
AK
RH
VF
OJ
XB
OJ
XB
RH/VF
IS
IZ
IR
FZ/I*/J*/TZ/X*/YE/OB
MW
VW
VW/MW
X2
XM
JK
X2
AZ
JK
X2
VZ
RW
MW
X1
X1
ID
OC
AG
MC
MB
AZ
FO
FX
FH
FC
FJ
FX
ML
IP
IW
MW
IH
IH
M7
XM
Index page 6 of 22
Subject
Gauge Corner Cracking (GCC) / RCF emergency speed restriction
Gearbox technical faults below solebar on a passenger train
Good practice statement
GOTCHA No fault found Network Rail or wrong detection
Grease, oil or substance on railhead source can not be identified
Ground frame telephones
GSM-R ARS ACI incorrect Rep No or berth
GSM-R cab based equipment vandalised
GSM-R cab radio software fault
GSM-R call picked up by wrong mast and wrongly routed
GSM-R driver error including entering wrong registration code
GSM-R driver fails to de register radio
GSM-R fault on Network Rail infrastructure no fault identified
GSM-R fault on train no fault found.
GSM-R fault with infrastructure or signalling based equipment
GSM-R hardware fault on train, cause identified
GSM-R infrastructure maintenance staff error
GSM-R infrastructure or signal centre based equipment vandalised
GSM-R no fault found train operator
GSM-R operational system faults and failures. Flow chart
GSM-R REC error from cab by authorised person on network
GSM-R REC error from cab by train maintenance staff on network
GSM-R REC error from cab off network
GSM-R REC error from cab off network preventing access to network
GSM-R REC from cab by unauthorised person no operational event
GSM-R REC initiated by a none TAC party from off network
GSM-R REC initiated by Network Rail maintenance staff in error
GSM-R REC initiated by signaller in error
GSM-R REC operational event safety reported in good faith.
GSM-R REC unable to identify responsible part no technician report
GSM-R registration failure signaller entering wrong Rep No or TD berth
GSM-R registration failures, no technical or responsibility identified
GSM-R signal on train lost no cause identified no other trains affected
GSM-R technical registration failure
GSM-R telecommunications equipment in line side equipment room
GSM-R train borne fault safety system within the cab passenger train
Guidance on responsibility and coding of delay incidents
Guidance where no fault found (NFF) technical equipment
Headlight out or showing wrongly
Heat blanket restriction per group standards
Heat flow chart weather delay code guidance
Heat severe affecting infrastructure NR responsibility not for speeds
Heavy axle weight restrictions (RT3973) (schedules)
High temperature buckled rails
High winds flow chart weather
Holding codes pending investigation (PGD7)
Horn train borne fault safety system within the cab (passenger)
Hot axle box (HABD) confirmed activation or positive on train
Hot axle box (HABD) no fault found (NFF) Network Rail
Hot axle box (HABD) no fault found (NFF) or wrong detection (R3)
Hot axle box (HABD) on board train no fault found train operator
Hot axle box (HABD) train borne safety system faults passenger train
Ice flow chart weather delay code guidance
Ice on OHLE or conductor rail due to failure to run de-icing train
Ice on OHLE or conductor rail unless due to failure of de-icing train
Ice or water on running railhead (Q5.9)
Ice,snow or frost non severe affecting infrastructure equipment
Icicles hanging from NR infrastructure train damage or severe weather
Ill passenger on platform
Ill passenger on train
Incident within network yard or terminal causing terminal delays
Incidents allocation of minutes and reliability events to an organisation
Delay Attribution Principles and Rules
June 2017
Clause
O2.4.n
G1.2.e
Specific Codes
JS
MD
R3.5
F1.7.3.d
O1.7
G5.2.l
G5.2.h
G5.2.p
G5.2.g
G5.2.f
G5.2.e
G5.2.c
G5.2.d
G5.2.a
G5.2.b
G5.2.j
G5.2.i
R3.5
G5.1
G4.1.d
G4.1.e
G4.1.f
G4.1.g
G4.1.h
G4.1.c
G4.1.j
G4.1.i
G4.1.a
G4.1.b
G5.2.k
G5.2.m
G5.2.o
G5.2.m
O1.5.b
G1.2.b
D1
R3
R2.4.k
Q5.4.f
Q5.8
Sx
L1.2.f/g
Q5.4.u
Q5.6
R4
G1.2.b
R1.3.c
R3.5
R1.3.d
R3.5
G1.2.f
Q5.9
Q5.4.h
Q5.4.g
F1.7.3.c
Si
Q5.4.t
Sr
Sv
H4.2.e
B6
IN
OZ
IK
OH
VA/FZ
J0
J0
TG/FC
TG/FC
I0
M9
J0
M0
JL
XB
M*
TG/FZ/J0/MD/M8/M9
TG/FC/TH/TZ
MU
MU/TG/FC/TH/TZ
MU
VA/RZ/FZ
XZ
JL
OC
J0
OC
J0
J0
J0
J0/IK
M0
TJ/FM
X4
XH
QA/QM/FH/TA
IR
D*
M0
MT
IN
IN
MT
OE
OG
MP
IW
XT
RO
VD
Index page 7 of 22
Subject
Incidents arising out of other access agreements
Incidents at stations flow chart guidance for the allocation of delays
Incorrect marshalling not dangerous goods
Incorrect routing on an agreed diversionary route
Incorrect routing the driver not stopping and taking route.Two incidents
Incorrect train dispatch by station staff
Index of various scenarios contained in the DAPR
Industrial action causing un-planned delays.
Infestation damage due to repeated chronic animal behaviour
Infrastructure based equipment no fault found Network Rail (R1.3.d)
Infrastructure defect Network yard or terminal (H1)
Infrastructure failure accepted design limitations (ADL)
Infrastructure failure weather equipment outside design
Infrastructure failure weather equipment within design
Infrastructure off network
Infrastructure other code IZ when not to be used
Infrastructure privately owned off network
Infrastructure staff oversight or error including maintenance staff
Infrastructure trains arriving or leaving possessions
Infrastructure vandalism or theft
Injury including fatality stuck by a train (PGD6/13)
Injury sustained when on platform struck or falling from train
Injury to member of staff
Injury to passenger accidental
Inquiry possible operator responsibility (R4)
Insulated block joint (IBJ) cautioning dipped joint
Insulated block or rail joint (IBJ/IRJ) does not cause a track fault
Insulated block or rail joint (IBJ/IRJ) fault within joint
Internal lighting technical faults above solebar on a passenger train
International channel tunnel locomotive failure defect or attention
Investigation of a delay not made correctly mis-investigation
Investigation pending holding codes
Inward booked train crew (reactionary)
Inward stock or unit late arrival booked (reactionary)
Items cause obstruction,include trees not vandal,weather or from train
Items miscellaneous on OHLE other than vandalism
IVRS Interactive voice radio system
IVRS Interactive voice radio system no fault found. Network Rail
Joint incidents at stations (PGD6)
Joint responsibility criteria not applying (PGD6)
Joint responsibility incidents including exceptions (PGD6)
Joint responsibility vandalism, theft or trespass (PGD6)
Jointly agreed neutral zones for autumn
Key route strategy (KRS) weather snow
Landslide or landslip
Late arrival of booked inward stock or unit (reactionary)
Late arrival of booked train crew (reactionary)
Late from Europe freight/passenger
Late running possession principal incident causing train to be late
Late running train booked crew service recovery (reactionary)
Late start different operator
Late start from origin not train crew
Late start late inwards
Late start mitigation
Late start network yard crew,vehicles,loading or FOC issue
Late start stock change
Late start train crew (J2)
Leaf fall contamination adhesion problems during autumn
Leaf fall contamination cautioning during autumn
Leaf fall contamination during autumn
Leaf fall during autumn
Leaf fall operation Special working implemented for track circuits
Delay Attribution Principles and Rules
June 2017
Clause
D3
N11
I2
K5
K6
Sr
D6
R1.3.x
Q1.1
R3.1
H4.2.a
O1.15.a
Q5.4.b
Q5.4.a
O1.2.a
O1.18
O1.12
Sj
P2.14
Q4
Q3
Sv
R1.3.j
R1.3.h
R1
O1.3.b
O1.3.b
O1.3.b
G1.2.d
Sm
E2.4
R4
Sy
Sy
Sj
O4.2.c
O1.9
R3.5
D2.13
D2.12
D2
Q4.3
F1.4.1
Q5.4.m/n
O1.2.i
Sy
Sy
Sf/t
P2.17
Sy
J1.2
J1
J1.1
J1.3
H4.2.b
J1.5
J1.4
F1.7.1.d
F1.7.1.g
O1.3.c
F1
F1.7.1.h
Specific Codes
AZ
OC
OC and TG/FP
R1
I*/J*
IN
I*/J*/X*
I*/J*
X*
I*/J*
AX/TX
IZ
AX
JL
I7
XC/VC/AZ/FZ
VC
M*/R*/T*/V*
IS
IS
IS
M8
MF
ON
D*
YJ
YI
JX
I*/X*
J0
IN
IW/XT
IV
YI
YJ
FN / TN
YN
Y*
A*/F*/M*
QH
QI
QJ
QJ
Index page 8 of 22
Subject
Leaking wipers weather delays associated with passenger train
Level crossing failure,barrow,foot crossings, treadles and damage
Level crossing misuse
Level crossing road related incidents external
Level crossing salt from road.
Level crossing telephones (LCT) (both Network Rail and BT lines)
Level Crossings CCTV DOO telecoms cable feed
Lift failure at a station including esculators
Lifting bridge failure
Lightning strike on Network Rail assets no protection
Lightning strike on Network Rail assets with protection
Lights internal technical faults above solebar on a passenger train
Line blocking incidents unplanned
Line blocks
Line search by Police
Lineside cable fault signalling
Lineside location cabinet
Lineside telephones
Loading excessive luggage
Loading problems freight not dangerous goods including adjusting
Loading supplies including catering
Location cabinet
Loss in running unexplained (PGD12)
Lost luggage
Lost path followed train running less late (reactionary)
Lost path following another later running train (reactionary)
Lost path regulated for another late running train (reactionary)
Lost path regulated for train running less late (reactionary)
Lower priority train regulation
LRA railhead examination failure to carry out (F1.6) autumn
Luggage excessive loading
Luggage lost
LUL delays on non Network Rail lines not T&RS
LUL passenger charter excludable events
Maintenance depots for fleet
Maintenance of vegetation per standards Network Rail boundaries
Maintenance staff error GSM-R infrastructure staff
Management freight services during disruption (MFSDD) (PGD9)
Manual treatment of railhead during autumn (F2)
Marker light out or showing wrongly
Marshalling dangerous goods
Marshalling incorrect not dangerous goods
Marshalling late arrival part of train
Marshalling signaller wrong order or platform
Masonry encroaching NR infrastructure not weather or vandalism.
Measuring and recording the cause of delay
Minutes delay not apparently due to Network Rail (E4)
Miscellaneous items on OHLE other than vandalism
Misdirected passengers, station staff error
Mishaps and major safety incidents (R4)
Mishaps freight
Mishaps other infrastructure clause
Mishaps station operating causes
Mishaps train operating company cause
Misinvestigation of a delay
Mistaken report infrastructure categorically proved mistaken report
Misuse of level crossing
Mitigation during autumn
Mitigation failure to do after reasonable request (D2.10)
Mitigation resource crew/stock conflicts,errors,omission freight
Mitigation resource crew/stock conflicts,errors,omission passenger
Mitigation timetable contains conflicts, errors, omissions freight
Delay Attribution Principles and Rules
June 2017
Clause
G1.2.j
R1.3.m
R1.3.n
O1.2.c
O1.2.f
O1.7
O1.7
N2.q
O1.2.h
Q5.4.r
Q5.4.s
G1.2.d
M2
P2.9
Sx
Si
O1.5
O1.7
Sr
I1
St
O1.5
E4
Sr
Sy
Sy
Sy
Sy
So
F1.7.1.f
Sr
Sr
St
Sv
H1
F1.7.1.b
G5.2.j
L1.7
F1.7.4
R2.4.k
I2.2.a
I2
I2.2.b
I2.2.c
Sx
B5
E2
O4.2.c
Sr
R1
Sf
Si
Sr
St
E2.4
R2.4.o
R1.3.n
F1.4.3
D4.2
L2.6.d
L2.3.d
L2.6.c
Specific Codes
MW
ID
XD
XD
XN
IK
IK
RE
JD
J6
X3
M8
I6
XF
II
IA/IB/IC/IE/II/IH/XK/X4
IK
RT
AG
T4
IA/IB/IC/IE/II/IH/XK/X4
RU
YC
YD
YB
YA
OB
QI
RT
RU
TX
VW
FZ/I*/J*/TZ/X*/YE/OB
JP
JL
PGD9
FM/TJ
FA
AZ
YI
OC
XO
FO/TO
I*/X*
R5
FZ
IZ
RY
TY
ON
J5
XD
T*
T*
OD/QN
Index page 9 of 22
Subject
Mitigation timetable contains conflicts, errors, omissions passenger
Multi purpose vehicles (MPV) (RHC)
Multiple worksite possessions
National grid including power failures
Network code
Network delays (B5.3)
Network Rail control decision or directive
Network Rail maintenance staff REC GSM-R initiated in error
Network Rail managed station delays
Network Rail managed stations (definition). Security alert (Q7.1)
Network Rail managed stations fire, definition (Q8.1)
Network Rail manager codes
Network Rail manager codes attribution examples
Network Rail operating cause
Network Rail operating staff issue not signaller or control
Network Rail staff oversight or error
Network yard late start crew,vehicles,loading or FOC issue
Network yard or terminal delays entering/leaving incident within
Network yard or terminal infrastructure defect (H1)
Network yard or terminal waiting acceptance due to late running
Neutral zone autumn attribution
Neutral zone concept autumn
Neutral zone incidents setting up during autumn
Neutral zone incidents use of during autumn
Neutral zone list during autumn delays not on jointly agreed list
Neutral zone reasonable level of time loss autumn
Neutral zone review during autumn
No cause ascertainable sub threshold (PGD12)
No cause found (R3)
No cause identifed after full investigation
No fault found infrastructure based equipment Network Rail (R1.3.d)
No fault found safety incident infrastructure public report
No fault found safety incident Network Rail staff unable to find
No fault found technical equipment guidance
No fault found train borne equipment (train operator)
No fault found train borne systems on freight trains (R3)
No fault found train borne systems on passenger trains (R3)
Non malicious injury to passenger
Non Network Rail lines passenger charter excludable
Non Network Rail running lines such as LUL (not T&RS)
Non severe weather snow,ice or frost affecting infrastructure equipment
Not leaving network by train leaving Network (reactionary)
NRN no fault found train operator
NRN off train or telecom equipment failures legacy communications
NRN train borne fault safety system within the cab passenger trains
Objects encroaching NR infrastructure not weather or vandalism
Objects placed deliberately on Network Rail infrastructure incl points
Objects thrown or fired at trains
Objects thrown or fired from trains
Objects thrown or fired onto Network Rail from fleet depots
Obstruction hit by train,include trees not vandalism,trespass,weather
Obstruction on line due to flooding including trees
Obstruction on line due to wind including trees
Obstruction safety confirmation of reported obstruction
OCB OHLE trip cause not known including obstruction
Off network freight terminals/yards waiting acceptance yard/siding
Off network GSM-R REC when not registered to track access party
Off network infrastructure yards (PGD8)
Off network not leaving network by train leaving network reactionary
Off network REC GSM-R error from cab
Off network REC GSM-R error from cab preventing access to network
OHLE ADD Electric traction, automatic dropper device
Delay Attribution Principles and Rules
June 2017
Clause
L2.3.c
F2.2
P2.12
O1.5
A2.3
O2.3
So
G4.1.j
N4
Q7.6
Q8.6
B6.7
B6.17
So
So
Sj
H4.2.b
H2.3
H4.2.a
H4.2.c/d
F1.4.1
F1.5.1
F1.5.1
F1.5.2
F1.6
F1.4.2
F1.4.4
Sz
R2.3
Sz
R3.1
R2.4.n
R2.4.m
R3
R3.3
G1.3.d
G1.2.l
N2.b
Sv
St
Si
Sy
R3.5
O1.8
G1.2.b
Sx
Q4.1.b
Q4.1.b/c
Q4.1.f
Q4.1.e
R2.4.h/i
Q5.4.j
Q5.4.i
R2.4.g
O4.2.b
H2
G4.1.c
H3
Sy
G4.1.f
G4.1.g
O4.2.e
Specific Codes
OD/QN
OB/OE/OS/QA/QM/QN
IA/IB/IC/IE/II/IH/XK/X4
OD
JL
OZ
OK
JL
A*/F*/M*
See H4
I*/J*/X*
Y*
ZS
ZU
IN
J4
F*/N*/M*/T*
M9
M9
VD
VW
TX
IW
YT
M*
I0
M0
XO
XB
XB/VB/AZ
VB
MU
JX
X2
XW
JX
I2
XZ
YT
MU/TG/FC/TH/TZ
MU
M1
Index page 10 of 22
Subject
OHLE failure including bond or defect
OHLE incident subject to formal enquiry
OHLE items on, miscellaneous other than vandalism
OHLE obstruction unknown reason
OHLE power reduction
OHLE switches,breakers,feeders,irregularities
OHLE trip cause not known (OCB)
OHLE trips not pantograph unknown reason
OHLE trips vegetation
OHLE vandalism
Oil grease or substance on railhead source can not be identified
On network REC GSM-R error from cab by authorised person
On network REC GSM-R error from cab by train maintenance staff
On track equipment failure
On track Machine (OTM) damaging infrastructure in a possession
On track Machine (OTM) yellow plant
On track machinery damage through incorrect use
On track plant (OTM) (yellow plant) fleet problem
Operating staff oversight, error or absence not signaller or control
Operational event safety reported in good faith (GSM-R) (REC)
Operational GSM-R railway emergency call (REC)
Operational GSM-R system faults and failures.Flow chart
operations staff errors.Network Rail
Operator terminals or yards or none Network Rail operated.Off network
Origin late start not train crew
Other external causes responsibility of Network Rail
Other forms of transport due to weather not meeting external criteria
Other freight operating company cause to be specified
Other infrastructure cause
Other passenger or external causes responsibility of TOC
Other passenger train operating cause
Other station operating causes
OTMR train borne fault safety system within the cab passenger train
Over speed TPWS or train stop intervention against danger signal
Overcrowding an operators train cancelled or delayed
Overcrowding reactionary other services cancelled
Overcrowding reactionary short formed train
Overhead power lines national grid,gas or water mains
Overloaded freight (not dangerous goods) including possession
Overruns possession (P2.5)
Overruns possession defect found
Overruns track patrol
Overweight against the timing load
Overwhelmed asset weather
PANCHEX activations on passenger trains
PANCHEX no fault found Network Rail or wrong detection
Panel failure
Pantograph faults on passenger trains
Parcels vehicle delays
Passenger accidental injury
Passenger assault
Passenger charter excludable criteria due to weather (C2.6)
Passenger charter excludable events on LUL or non Network Rail lines
Passenger communication pulled
Passenger doors delays associated with faults on doors & associated
Passenger drop item signaller delays train to remove, not obstruction
Passenger dropped object causing obstruction but not on or off train
Passenger dropped object whilst boarding or alighting held by TOC
Passenger external other responsibility of TOC
Passenger facilities failed technical faults above solebar on train
Passenger fallen between train and platform whilst boarding/alighting
Passenger injury non malicious
Delay Attribution Principles and Rules
June 2017
Clause
O1.11
O4.2.g
O4.2.c
O1.11
O4.2.d
O1.11
O4.2.b
O1.11
O1.11
O4.2.f
F1.7.3.d
G4.1.d
G4.1.e
Si
Sj
P1
O1.17
G1.3.e
So
G4.1.a
G4
G5.1
O1.17
H3
J1
Sx
Q5.2
Sa
Si
Sv
St
Sr
G1.2.b
G6.1.a
C1.6
Sy
Sy
Sx
I1
P2.19.e-h
P2.19.o
P2.19.n
I1.2.b
Q5.9
G1.2.a
R3.5
Si
G1.2.a
G1.2.n
R1.3.h
R1.3.i
Q5.1
Sv
Sv
G1.2.c
N2.ag
N2.af
N2.ae
Sv
G1.2.d
N2.ad
N2.b
Specific Codes
I1
I*/X*
I2
I4
I4
I2
I2
JP
XB
OZ
TG/FC/TH/TZ
MU
IJ
J8
MV/I7/I5
J8
MV/I7/I5
OK
TG/FZ/J0/MD/M8/M9
OC/OK
XZ
I*/J*/M*
AZ
IZ
VZ
TZ
RZ
M0
FC/TG
YX
YQ
XM
AG
I5/QM
I*/J*
I6
FX
XT
M1
IN
IF
M1
ML
M*/R*/T*/V*
VB
V*/X*
VW
VH
M7
OZ
JX
RP
VZ
M8
RY/RZ
VD
Index page 11 of 22
Subject
Passenger joining or alighting special event
Passenger joining or alighting station overtime
Passenger lost luggage
Passenger operator train driver
Passenger overcrowding (reactionary) including own late running
Passenger overcrowding (reactionary) short formed train
Passenger overcrowding due to operators service cancelled or delayed
Passenger taken ill on a platform
Passenger taken ill on a train
Passenger train operating cause other causes
Passing booked trains possessions (P2.11)
Patrolling blocks
Patrolling including when published P code not utilised
Pending investigation holding codes (PGD7)
Permissive working at stations (PGD10) (NR operating)
Permissive working at stations (PGD10) (station staff)
Personal needs break (PNB) train crew further delay
PIBS No fault found (train operator)
Placing objects deliberately on Network Rail infrastructure incl points
Planned cancellation by train operator including bank holidays (C2.8)
Planned cancellation duplicate or erroneous schedule
Planned cancellation not cancelled or engineering work (C2.8)
Planned cancellation through train planning system (TPS)
Planned engineering work/divert.SLW not timetable within ROR/EAS
Planned engineering work/divert.SLW not timetabled out of ROR/EAS
Planned P codes
Planned possession reactionary trains not retimed (P2.2)
Planned possessions
Planned temporary speed restrictions (TSR)
Planned TSR (P coded) reaction to
Planning issues including loco diagram or RT3973 not requested
Planning related delays flow chart (schedules)
Platform alteration actioned by CIS not updated
Platform alteration by signaller for given reason
Platform alteration requested to and actioned by signaller
Platform alteration varies from CIS, signaller passengers joining
Platform alteration varies from CIS, sufficient time. Passengers
Platform alterations actioned by ACI
Platform change,waiting platform,station congestion (reactionary)
Platform changes and alterations
Platform fatality,injuries, being struck or fallen from train (PGD13)
Platform persons falling, jumping or dangling legs
Platform staff not confirm to signaler waiting confirmation of position
Platform staff stopped train in wrong part of platform
Platform structural problem which impeding the safe passage of trains
Point failure caused by severe snow heaters working as designed
Point heaters defective snow or frost causing points failure
Point heaters not fitted points failure
Point heaters severe snow points failed heaters working as designed.
Points failure
Points failure caused by snow or frost where heaters not fitted
Points failure snow or frost defective point heaters
Points telephones
Police searching the line
Police searching train not security
Poor brakes on passenger trains
Poor ride quality (O1.4)
Poor ride quality no apparent cause
Possession agreed TOC/NR not to retime or NR fails to retime
Possession and infrastructure trains incidents
Possession communication issues late hand back
Possession infrastructure trains arriving or departing
Delay Attribution Principles and Rules
June 2017
Clause
N2.j
N2.i
Sr
St
Sy
Sy
C1.6
Sr
Sv
St
P2.19.k
P2.9
P2.19.i/j/l
R4
K8.a/b
N2.al/am
J2.4
R3.5
Q4.1.b
L1.5
Sp
L1.5
L1.5/6
Sp
Sq
C2.8
P2.19.d
P2.19
O2.4.a/b
P2.19.c
Sf
L1.3
N9
N7
N8
N6
N6
N10
Sy
N6
Sv
Q4.1.m
N2.al
N2.am
O1.2.j
Sx
Si
Sj
Sx
Si
Sj
Si
O1.7
Sx
N2.ab
G1.2.h
R2.4.a
R2.4.b
L1.2.e
4.13
O1.17
P2.14
Specific Codes
R7
RB
RU
TG
YX
YQ
RO
VD
TZ
I5/I6/P*
I6
I6
D*
OC/OD/OZ
R3/R4/R5
M*
XB
PE/PG
PJ
PE/PG
PD
PF
QB
QP
PF/QB
PA/JA
JB
FH
OQ/QA/QM/QN
OC
OH/QA/QM
YO
VC
XA
R3/R4/R5
R5
JD
X9
IP
JT
X9
IB
JT
IP
IK
XF
VG
MN
IS
IT
QB
I5
I7
Index page 12 of 22
Subject
Possession on track machine (OTM) damage to infrastructure
Possession on track machine (OTM) or engineering haulage.
Possession overrun defect found
Possession overrun due to removal of staff from a worksite
Possession overrun due to substandard action of staff
Possession overrun substandard action signaller,LOM or MOM
Possession overrun track patrol
Possession overruns
Possession passing booked trains
Possession planned (reaction) not retimed
Possession with a single worksite
Possession with multiple worksites
Possession work not completed TSR/ESR
Possessions leaving equipment in failure mode
Power distribution system functional supply points (FSP)
Power failure, signalling functional
Power reduction OHLE
Power supply failure at a station
Power supply failure at a station affecting mail or parcels
Power supply failure at a station external
Power supply failure external supplier
Power supply failures
Preparation of freight train waiting trains list
Preventative maintenance response remote condition monitoring alert
Primary delay (PGD1)
Prime cause (PGD1)
Prime cause delay (PGD1)
Principal supply points (PSP)
Privately owned infrastructure off network
Provision of information
Provision of specified equipment locos and wagons freight operators
Provision of stock passenger operators
Public no fault found (NFF) Safety incident infrastructure
Radio failures legacy communications
Rail defects
Railhead conditioning train (RHC)
Railhead conditioning train (RHC) delays including reactionary
Railhead conditioning train (RHC) failure
Railhead conditioning train (RHC) long time in section other train delay
Railhead conditioning train (RHC) none treatment
Railhead conditioning train (RHC) schedule pathing
Railhead conditioning train (RHC) train late start
Railhead contamination of railhead after spillage from train
Railhead examination failure to carry out after ERHC/LRA (F1.6)
Railhead manual treatment during autumn (F2)
Railhead needs cleaning
Railhead oil, grease or substance source can not be identified
Railhead treatment not applied at planned locations (F2) autumn
Railhead treatment program failure to operate during autumn
Railhead treatment the principles
Railhead water or Ice on running railhead (Q5)
Railway emergency Call (REC) (GSM-R)
Re platforming or platform change
Reaction to planned possession not retimed
Reaction to planned TSR
Reactionary delay (PGD2/3)
Reactionary delay additional guidelines (PGD2/3)
Reactionary delay recovery time. Example 2
Reactionary delay splitting two delays same effect. Example 1
Reactionary delay splitting. Same value two or more incidents
Reactionary to planned possessions
Reasonable time loss in section autumn minutes in excess of agreed
Delay Attribution Principles and Rules
June 2017
Clause
Sj
P1
P2.19.o
P2.19.q
P2.19.r
P2.19.p
P2.19.n
P2.5
P2.19.k
P2.19.d
P2.11
P2.12
O2.4.c
P2.8
O1.5.b
Si
O4.2.d
N2.s
N2.u
N2.t
O1.2.k
O1.5
Sa
Sj
B7.2
B7.1
C1.4
O1.5.b
O1.12
A3
L2.4
L2
R2.4.n
O1.8
O1.4
F2
F1.7.1.c
F2.3.j
F2.3.g
F2.3.k
F2.3.b-d
F2.3.h
F1.7.3.b
F1.7.1.f
F1.7.4
F1.7.3.a
F1.7.3.d
F1.7.1.f
F1.7.1.a
F1.7.5
F1.7.3.c
G4
N6
P2.19.d
P2.19.c
B7.3
D5.3
D5.5
D5.1
D5.5
P2.2
F1.7.2.c
Specific Codes
J8
MV/I7/I5
I*/J*
I5
I5
I5
I5
I5
I5/P*
QP
JG
I*/J*
IH
IE
I4
RZ
AZ
VZ
XK
IA/IB/IC/IE/II/IH/XK/X4
AC
J9
IH
AX
J4
I0
IR/IS/IT
OB/OE/OS/QA/QM/QN
OS
OM
OS
QA/QM/QN
OS
M*
QI
IZ
OZ
QI
See F2
MP
QP
JB
Y*
Y*
Y*
Y*
Y*
QP
FG/TW
Index page 13 of 22
Subject
REC GSM-R error from cab by authorised person on network
REC GSM-R error from cab by train maintenance staff on network
REC GSM-R error from cab by unidentified person on network
REC GSM-R error from cab off network
REC GSM-R error from cab off network by an unidentified person
REC GSM-R error from cab off network preventing access to network
REC GSM-R from cab by unauthorised person no operational event
REC GSM-R initiated by Network Rail maintenance staff in error
REC GSM-R initiated by signaller in error
REC initiated by a none TAC party from off network (GSM-R)
REC operational event, safety reported in good faith. (GSM-R)
REC unable to identify responsible part no technician report (GSM-R)
Recording of reliability events
RED alert declared by route controls EWAT initiated
Reduced mobility passengers join or alight. Pre booked or un booked
Reduction of speed due to weather
Refusing to pay ticket irregularities (TI)
Regaining lost time subsequent delay
Registration failures GSM-R no technical or responsibility identified
Regulated following a train running less late (reactionary)
Regulated following another later running train (reactionary)
Regulated for another late running train-lost path (reactionary)
Regulated for train running less late-lost path (reactionary)
Regulated in accordance with regulation policy (reactionary)
Regulated to or from single line (reactionary)
Regulation and signalling of trains
Regulation ARS controlled areas. Flow chart
Regulation decision made with best endeavours
Regulation early running at request of driver or shunter signaller agreed
Regulation early running control agreement
Regulation early running error at point of delay
Regulation early running not held at prior regulating point
Regulation early running out of path result of a known incident
Regulation policy, regulated in accordance with (reactionary)
Reinstating planned cancellations not being permitted
Relay room
Reliability events
Remote condition monitoring alert-preventative maintenance response
Remote control failure
Renewal date exceeded temporary speed restriction (TSR)
Reservation seating problems
Responsible manager codes
RETB emergency telephones
RETB no fault found (train operator)
RETB telecom equipment failure, legacy communications
RETB terminal failure (R3.1)
RETB train borne fault safety system within the cab (passenger)
Revisions to the delay attribution gprinciples and rules
Right away (RA)/close door (CD) defect
Right away (RA)/close door (CD) defect,operator mitigation not made
Right away (RA)/close door (CD) sunlight operator mitigation not made
Right away(RA)/close door(CD)sun on equipment mitigation in place
Road connections
Road related incidents damaging level crossing equipment
Road related incidents not level crossing or bridge
Road vehicles hitting bridges bridge Strike
Rolling contact fatigue (RCF) / GCC emergency speed restriction
Rostering train crew problem
Rough ride (H1.2.a) poor ride quality
Rough ride no apparent cause
Route knowledge lacking diverted not in contingency plan
Route knowledge lacking diverted per pre arranged contingency plan
Delay Attribution Principles and Rules
June 2017
Clause
G4.1.d
G4.1.e
G4.1.d
G4.1.f
G4.1.g
G4.1.g
G4.1.h
G4.1.j
G4.1.i
G4.1.c
G4.1.a
G4.1.b
B4
Q5.1
N2.k
Q5.12
N2.z
D5.4
G5.2.m
Sy
Sy
Sy
Sy
Sy
Sy
K1
K9
K4
K7.d
K7.c
K7.a
K7.b
K7.e
Sy
L1.6
O1.5
A4
Sj
Si
O2.4.f
N2.c
B6.4
O1.7
R3.5
O1.8
O1.10
G1.2.b
A6
N2.ah
N2.ai
N2.ak
N2.aj
Sr/t
O1.2.c
O1.2.e
Q2
O2.4.n
St
R2.4.a
R2.4.b
M1.b
M1.a
Specific Codes
TG/FC/TH/TZ
MU
TG/FC/TH/TZ
MU/TG/FC/TH/TZ
MU
MU
VA/RZ/FZ
JL
OC
XZ
J0
V*/X*
RC/RQ
VE
J0
YC
YD
YB
YA
YG
YE
OA/OB/OD/Y*/OQ
OA
OC
OD
OB
OC
Y*
YG
PD
IA/IB/IC/IE/II/IH/XK/X4
J9
IF
JS
TF
IK
M9
I0
IL
M0
IA
R1
R1
XU
RM/T3
XD
XN
XP
JS
TI
IT
FH/TI
Index page 14 of 22
Subject
Routing incorrect driver not stopping and taking route
Routing incorrect on an agreed diversionary route
RT3185/7 forms signaller completion of when trains overlooked
RT3973 schedule ADL not taken into consideration
RT3973 schedule error timings requested by operator
RT3973 schedule timings not requested by operator
RT3973 waiting train preparation or completion of TOPS list
Running brake tests weather
Safety defect traction or stock
Safety incident infrastructure categorically proven mistaken report
Safety incident Network Rail staff unable to find
Safety incident operators staff unable to find
Safety incidents and mishaps (R4)
Safety problems reported by staff or public the principle.
Safety reported in good faith GSM-R REC
Salt from road near level crossing
Sanders faults on passenger trains
Sandite train (RHC)
Sandite vehicle break down train failure or problem
Schedule ADL not taken into consideration
Schedule error on a WTT/LTP trains including simplifiers
Schedule error RT3973 requested by operator
Schedule error RT3973 timings not requested by operator
Schedule error STP/VAR service including simplifiers
Schedule error VSTP unvalidated timings used
Schedule error VSTP where train is using validated WTT/STP times
Schedule flow chart planning related delays
Schedule not retimed for possession or NR/TOC agree not to retime
Schedule STP in conjunction with a freight schedule
Scrubbers faults on a passenger train
Sea defences
Searching train police not security
Seat reservation problems
Seating broken technical faults above solebar on a passenger train
Security alert adjacent to Network Rail infrastructure
Security alert affecting a station where trains can pass (PGD6)
Security alert affecting a station where trains can stop (PGD6)
Security alert affecting operators who do not stop at station
Security alert flowchart
Security alert in fleet depot
Security alert in freight depot off network
Security alert joint responsibility
Security alert Network Rail managed stations (definition) (Q7.1)
Security alert non Network Rail not passenger trains
Security alert on a train
Security alert stations affecting mail, parcels, charters
Selective door operation (SDO) no fault found (train operator)
Semaphore signalling fog and falling snow regulations
Semaphore signals visibility due to weather (Q5.12.b)
Senior conductor
Service recovery and contingency plans
Service recovery booked stock not available (reactionary)
Service recovery tactical cancellation not caused by late running
Severe cold weather affecting infrastructure responsibility of NR
Severe flooding obstructions on line, including trees
Severe heat affecting infrastructure NR responsibility not for speeds
Severe weather passenger charter excludable
Severe weather passenger fleet depots
Short formed train (reactionary)
Shunter at a station
Sighting weather restrictions
Signal box concentrator system (CON)
Delay Attribution Principles and Rules
June 2017
Clause
K6
K5
R2.5
O1.15.f
L1.2.f
L1.2.g
Sa
Q5.12.e
R2.4.j
R2.4.o
R2.4.m
R2.4.l
R1
R2.2
G4.1.a
O1.2.f
G1.2.g
F2.1
G1.4.b
O1.15.f
L1.2.a
L1.2.f
L1.2.g
L1.2.b
L1.2.c
L1.2.d
L1.3
L1.2.e
L1.2.h
G1.2.g
O1.2.i
N2.ac
N2.c
G1.2.d
Q7.1.b
Q7.1.c
Q7.1.d
Q7.1.e
Q7.7
Q7.1.g
Q7.1.h
Q7.3
Q7.6
Q7.1.i
Q7.1.j
Q7.1.f
R3.5
Q5.4.p
Q5.4.aa
St
M1
Sy
Sy
Sx
Q5.4.j
Sx
Q5.1
Q5.4.k
Sy
N2.m
Q5.12.b-d
O1.7
Specific Codes
OC and TG/FP
OC
OC
QA/QM
QA/QM
TA/FH
AC
VW/MW
M*
J5
FZ/M9/TZ
XN
MR
OB/OE/OS/QA/QM/QN
OM
QA/QM
QA
QA/QM
FH/TA
QM
QN
QA/QM
OQ/QA/QM/QN
QB
QM
MR
IV
VG
TF
M8
XI
VI
VI
XI
VI
M*
AZ
VI/RZ/FZ
AZ
M7
X1
X1
TH
YU
YR
XT
X2
XH
V*/X*
VW
YQ
RD
IK
Index page 15 of 22
Subject
Signal box not open during booked hours
Signal box simplifier locally produced (L1.3)
Signal failure
Signal post telephone (SPT)
Signaller accidentally put signal to danger
Signaller ADL is not included in box instructions
Signaller can mitigate ADL in box instructions
Signaller completion of forms RT3185/7 trains overlooked
Signaller GSM-R registration failure entering wrong Rep No or TD berth
Signaller put signal back to danger safety reason
Signaller REC GSM-R initiated in error
Signaller stops trains to recover item which is not obstruction
Signaller unable to mitigate ADL box instructions
Signaller wrong ERTMS or ETCS instructions
Signaller wrong routing
Signalling and regulation of trains
Signalling anomaly
Signalling functional power supply failure
Signalling lineside cable fault
Signals obscured due to vegetation
Signals or signs obscured by snow
Signs defective or blown down
Signs obscured due to vegetation
Signs or signals obscured by snow
Simplifiers locally produced not train Planning (K3/L1.3)
Simplifiers signaller or station (L1.3)
Single worksite possessions
Slower vehicles stock swap or change
SLW engineering work planned not timetabled out of ROR/EAS
SLW planned engineering work not timetabled within ROR/EAS
SMART site or system failure automatic train reporting
Smoke fire from off network cautioning or stopping
Snow affecting infrastructure key route strategy (KRS) is in place.
Snow affecting infrastructure key route strategy (KRS) not in place
Snow flow chart weather
Snow obscuring signals or signs
Snow or frost defective point heaters points failure
Snow or frost points failure heaters not fitted
Snow plough break down train failure or problem
Snow several operating restrictions
Snow severe points failure heaters working as designed.
Solid State Interlocking failure (SSI)
SPAD by a railhead conditioning train (RHC) (R1.3.r-u)
SPAD or station overshoot at ERHC published contamination site
SPAD Signal passed at danger infrastructure failure former Cat B
SPAD Signal passed at danger signaller error former Cat B
SPAD Signal passed at danger signaller reverting signal in emergency
SPAD Signal passed at danger train operator cause Cat A
Special event passengers joining,alighting or station overtime
Special stop orders (SSO)
Special stop orders (SSO) unauthorised waiting issue
Special stop orders (SSO) waiting for authorisation
Special stop orders within contingency/agreed NR/TOC (reactionary)
Special train. Royal or military
Special working fog and falling snow regulations
Special working implemented for leaf fall track circuit operation
Speed reduction due to weather
Speed restrictions weather potential frozen brakes
Speedometer train borne fault safety system within the cab passenger
Sports event passengers joining or alighting special event
Staff error infrastructure
Staff error Network Rail including criteria for not considering
Delay Attribution Principles and Rules
June 2017
Clause
So
K6
Si
O1.7
R2.4.d
O1.15.e
O1.15.c
R2.5
G5.2.k
R2.4.e
G4.1.i
N2.ag
O1.15.d
So
K5
K1
R2.4.f
Si
Si
F1.7.1.b
Q5.4.z
O3
F1.7.1.b
Q5.4.z
So
K6
P2.11
Sm
Sq
Sp
E5.1
Q8.8.2
Q5.4.n
Q5.4.m
Q5.9
Q5.4.z
Si
Sj
G1.4.b
Q5.12
Sx
Si
F2.3.j
F1.7.2.b
R1.3.r
R1.3.t
R1.3.u
R1.3.s
N2.j
St
N2.x
N2.w
Sy
E6
Q5.4.p
F1.7.1.h
Q5.12
Q5.12.a
G1.2.b
N2.j
O1.2.o
O1.17
Specific Codes
OL
OQ/QA/QM
IA
IK
OC
I*/J*
OC
OC
OC
OC
OZ
I*/J*
OC
OC
OA/OB/OD/Y*/OQ
IA
IE
II
JP
XT
IQ
JP
XT
OQ
OQ/QA/QM
MS
QB
PF
OP
XK
XT
IW
XT
IP
JT
OM
X9
IF
TG/FC
I*/J*
OC
AZ/FC/FZ/M*/RY/TG/TH
R7
TP
RJ
RL
YM
OZ
X1
QJ
MW/VW
M0
R7
JL
JL
Index page 16 of 22
Subject
Staff error Network Rail operations not signaller or control
Staff error possession overrun
Staff injury
Staff shortage terminal or yard, off network
Staffing problems at station missing or uncovered
Standby supply equipment failure with external power supply
Standing water TOC/FOC directive not allowed to pass.
Star model diagram figure 1
Station buildings, weather affecting stopping trains
Station congestion,platform change or waiting platform (reactionary)
Station customer information system failures
Station delay passenger overcrowded (reactionary) incl own lateness
Station delays belived to be operator waiting information
Station delays belived to be operator waiting information
Station evacuated due to fire alarm
Station flooding, including drain, not weather or from Network Rail
Station incidents. Flow chart
Station joint incidents
Station late TRTS given by station staff
Station mishap operating causes
Station operating delays use of codes
Station or SPAD overshoot at ERHC published contamination site
Station other operating causes
Station overtime passengers joining or alighting.
Station overtime short-formed train (reactionary)
Station overtime special event
Station passenger drop object whilst getting on/off train held by TOC
Station passenger dropped object causing obstruction not on/off train
Station passenger failed between train and platform getting on/off train
Station power supply failure
Station power supply failure affecting mail or parcels
Station power supply failure external
Station signaller stops trains to recover item not an obstruction.
Station staff error wrong anouncements mis-direction
Station staff not confirm to signaler waiting confirmation of position
Station staff permissive working (PGD10) (NR operating)
Station staff split responsibility unable to cover all duties
Station staff stopped train in wrong part of platform
Station staffing problems when missing or uncovered
Station unstaffed non DOO train
Steam train locomotives on passenger trains
Stock change or set swap or change
Stock provision passenger operators
Stock service recovery booked stock not available (reactionary)
Striking overhead branches or vegetation not due to weather
Structural problem with platforms impeding the safe passage of trains
Structures problem on bridges, tunnels, viaducts and buildings
Sub threshold delays cumulative or succession (E4)
Sub threshold no cause ascertainable (PGD12)
Subsidence
Suicides including stuck by a train (PGD6/13)
Sun on right away (RA) /close Door(CD)
Sun on right away (RA) /close Door(CD) operator mitigation not made
Sun on signal aspect (Q5.4.o)
Sun on signaller panel
Sun on the cab windscreen (Q5.4.ab)
Sun on train dispatch equipment (N2.aj/ak)
Sun shining onto cab where driver not taken preventative action
Sun shinning on signal aspect driver unable to clearly see aspect
Sun visibility flow chart (Q5.4)
Supplies loading including catering
Surge voltage external power supply
Delay Attribution Principles and Rules
June 2017
Clause
So
P2.19.p
R1.3.j
Sa
N2.o
O1.5.b
Q5.4.v
C1.3
Q5.4.q
Sy
N2.r
Sy
Sr
St
Sr
Sr
N11
D2.13
N2.p
Sr
N3
F1.7.2.b
Sr
N2.i
Sy
N2.j
N2.ae
N2.af
N2.ad
N2.s
N2.u
N2.t
N2.ag
Sr
N2.al
K8.a/b
Sr
N2.am
N2.o
St
G1.2.m
Sm
L2
Sy
F1.7.1.b
O1.2.j
O1.2.g
D5.2
Sz
O1.2.i
Q3
N2.aj
N2.ak
Q5.10
Q5.10
Q5.10
Q5.10
Q5.4.ab
Q5.4.o
Q5.10
St
O1.5.b
Specific Codes
OK
I5
AD
R3
XK
MW/VW
VZ
YO
RV
YX
R8
T8
RH
RW
R2
RY
FC/TG
RZ
RB
YQ
R7
RP
JX
RZ/RY
RZ
AZ
VZ
OZ
R5
R3/R4/R5
OC/OD/OZ
R4
R5
R3
T2
ME
MS
YU
JP
JD
JD
ZS
IV
XC/VC/AZ/FZ
XU
R1
IZ/XU
OZ
M*/FG/FZ/TG//TW
VZ/AZ/IZ/XU
TG/FZ
XU
T4
XK
Index page 17 of 22
Subject
Suspect package on Network Rail infrastructure
Suspect package on train
Swing bridge failure
Swing bridge open for river of canal traffic
Tactical cancel for service recovery not caused by own late running
Tail lamp out or showing wrongly
Tail light train borne fault safety system within the cab passenger train
Take back no substantive delay reason
TASS balise activated train borne systems on passenger trains
TASS balise trackside infrastructure failure
TASS no fault found (R3)
TASS no fault found (train operator)
TASS on board system fails
TCA train borne safety system faults on passenger trains. Not cab
TDM Time division multiplex failure
Technical faults above solebar on passenger trains
Technical faults below solebar on passenger trains
Technical faults below solebar on passenger trains
Technical head train borne fault safety system within the cab
Telecommunication links with signalling equipment TDM/SSI/TD/BLO
Telecoms equipment failure, transmission sys & cable failure
Telecoms equipment failures, legacy NRN/CSR/RETB link
Telecoms incoming supply FTN/GSM-R
Telecoms radio failures IVRS
Telephones concentrator,SPT,LC,RETB,GF,Pts,line side
Temperature or wind blanket speed restrictions
Temporary speed restriction (TSR) condition of bridge (COB)
Temporary speed restriction (TSR) condition of Earthworks
Temporary speed restriction (TSR) condition of track (COT)
Temporary speed restriction (TSR) including emergency (ESR)
Temporary speed restriction (TSR) indicators defective or down
Temporary speed restriction (TSR) outside rules of route (ROR/EAS)
Temporary speed restriction (TSR) possession work not completed
Temporary speed restriction (TSR) work not completed
Terminal congestion off network
Terminal waiting traffic including documentation
Terminal yard staff shortage off network
Theft at a station
Theft infrastructure but not cables
Theft infrastructure on non Network Rail infrastructure
Theft of cable
Theft unexplained train coming to halt
Third rail failure or defect
Third rail obstruction reason unknown
Third rail shoe beam faults passenger trains
Third rail switches,breakers,feeders and irregularities
Third rail trips vegetation
Threat of trespass from station or footbridge
Ticket irregularities (TI)
Tilting trains TASS / balise
Time loss reasonable level of. Neutral zone during autumn
Timetable and resource planning incidents
Toilet doors delays associated with faults on doors & associated
Toilet technical faults above solebar on passenger trains
Token equipment failure
TOPS train list waiting or completion of list
TPS schedule cancellation
TPWS driver adhering to company professional driving standards
TPWS fault protecting signal at red including lineside equipment
TPWS intervention of failure
TPWS no fault found train operator (G6.1.c)
TPWS on track equipment failure
Delay Attribution Principles and Rules
June 2017
Clause
Q7.1.a
Q7.1.j
O1.2.h
Sx
Sy
R2.4.k
G1.2.b
Sq
G1.2.k
G2.1.b
G2.2
R3.5
G2.1.a
G1.2.f
Si
G1.2.d
G1.2.e
G1.2.e
G1.2.b
O1.6
O1.7
Si
O1.5.b
O1.9
O1.7
Q5.4.f
O2.4.g/h
O2.4.i/j
O2.4.d/e
O2
O3
Sj
O2.4.d
O2.4.c
Sa
Sa
Sa
N2.y
Q4.1.b
Q4.1.d
Q4.1.a
Q4.2
O1.11
O1.11
G1.2.a
O1.11
O1.11
Q4.1.l
N2.z
G2
F1.4.2
L1
G1.2.c
G1.2.d
Si
Sa
L1.5/6
G6.1.b
G6.3
G6
R3.5
O1.2.l
Specific Codes
XI
FZ/RZ/VI
JD
XQ
YR
FM/TJ
M0
QT
NA
IM
NA
NA
MT
IF
M8
MD
MD
M0
IK
IK
I0
XK
J0
IK
X4
PB/JD
PB/IV
JS/PB
IQ
JA
NOT JG
JG
AE
AJ
AD
VA
XB
VB/AZ
XR
I1
I2
M1
I4
JP
XA
VE
NA/IM
QA/QM/FH/TA
M7
M8
IL
AC
PD
TW/TG
IJ
FC/TG/FG/TW/MT/IJ
M*
IJ
Index page 18 of 22
Subject
TPWS on track equipment incorrectly installed or positioned
TPWS on train safety system failure
TPWS over speed or train stop intervention against danger signal
TPWS train borne safety system faults on passenger trains. Not cab
TPWS train stop sensor (TSS) intervention against proceed aspect
Track circuit failure (TCF)
Track defect not a rail defects. Fish plates, wet bed etc
Track defects
Track patrolling (M2)
Trackside signs including TSR/ESR board defective or down
Traction motors technical faults below solebar on train (passenger)
Traction power supply failure principal supply point (PSP)
Traffic waiting customer including documentation
Train based equipment failed-multiple infrastructure based equipment
Train based equipment list or responsibilities
Train based equipment two or more trains on track equipment faults
Train borne equipment no fault found (train operator)
Train borne safety system faults (passenger trains) not cab based
Train borne systems no fault found (R3) freight trains
Train borne systems no fault found (R3) passenger trains
Train crew booked not available service recovery (reactionary)
Train crew booking on duty including between turns
Train crew on duty travelling passenger on a late running service
Train crew personal needs break (PNB) further delay
Train crew stepping up significant lateness
Train crew travelling passenger planned cancellation.2200 hrs+ start
Train crew travelling passenger planned cancellation.Pre 2200 hrs start
Train crew waiting
Train crew working late inward services on the same turn of duty
Train describer, panel, ARS, SSI failure
Train dispatch equipment failure, Network Rail but not telecoms
Train diverted or re-routed at FOC request (freight)
Train held at FOC request freight services
Train manager,conductor,senior conductor or guard
Train operating company directive
Train operator mishap
Train operators request cancelled or delayed passenger services
Train plan
Train preparation, train list
Train stop failure
Train stop intervention or over speed TPWS
Train striking smaller birds the same size or smaller than a pheasant
Train time reports
Trains incurring several small delays (B6.7)
Treadle failure at level crossings
Trees encroaching NR infrastructure not weather or vandalism
Trees falling from outside railway boundaries not weather or vandalism
Trees on line due to wind
Trees on line obstruction or safety
Trespass on Network Rail exit from a train without permission
Trespass on Network Rail from freight trains ex Network Rail
Trespass on Network Rail from freight trains ex terminals/yards
Trespass on Network Rail infrastructure not from a trains
Trespass on non Network Rail infrastructure
Trespass threat of from station or footbridge
Trespass unexplained train coming to halt
Trip AC/DC. OHLE/3rd rail when cause not known
Trip cock train stop failure
Trolley catering problems
TRTS failure not registered, activation by dispatch staff demonstrated.
TRTS late train ready to start by station staff
TRUST delay codes (section S)
Delay Attribution Principles and Rules
June 2017
Clause
G6.1.d
G6.1.c
G6.1.a
G1.2.f
G6.1.e
Si
Si
O1.3
P2.19.i/j/l
O3
G1.2.e
O1.5.b
Sa
R3.2
R3.5
R3.2
R3.3
G1.2.f
G1.3.d
G1.2.l
Sy
J2.1/2
J2.3.c
J2.4
J2.3.b
J2.3.d
J2.3.e
J2
J2.3.a
Si
Sj
Sf
Sf
St
St
St
St
B2
Sa
Si
G6.1.a
Q1.6
B3
E4
Si
Sx
Sx
Q5.4.i
R2.4.g
Q4.1.h
Q4.1.k
Q4.1.j
Q4.1.g
Q4.1.d
Q4.1.l
Q4.2
O4.2.b
Si
N2.d
O1.16
N2.p
B6.3
Specific Codes
IJ
MT
TG/FC
MT
IJ
IC
IS
IR/IS/IT
I6
IQ
MD
IH
AJ
F*/N*/M*/T*
IN
F*/N*/M*/T*
MT
M9
M9
YN
FE/TG/TH
YJ
YN
FH / TI
FE/TG/TH/YJ/YN
YJ
IF
J2
FK
FJ
TH
TR
TY
TB
AC
IJ
TG/FC
V8
ID
XO
XO
XW
JX
VA
XA
AZ
XA
AZ/VB
XA
I2
IJ
TK
J2
R2
Index page 19 of 22
Subject
TRUST outages or failure preventing recording and investigation
TRUST train running system TOPS
TSI created by Network Rail schedule error (VSTP)
Tunnels structural problems
Twisted rail
Unauthorised person GSM-R REC from cab no operational event
Unexplained after full investigation
Unexplained believed to be down to freight operator (PGD12)
Unexplained believed to be down to operator passenger train (PGD12)
Unexplained delays succession (E4) (PGD12)
Unexplained loss in running (PGD12)
Unexplained train coming to halt vandalism,theft or trespass
Unidentified system roll up Cancel/late start/over time/loss in running
Uninterruptable power supply (UPS)
Union directive causing un-planned delays.
Unknown cause bumps
Unknown minutes delay not apparently due to Network Rail (E4)
Unknown train incurring several small delays (E2.1)
Unplanned line blocking incidents
Unplanned line blocking incidents capacity planning validated
Unplanned line blocking incidents could have been pre-empted
Unplanned line blocking incidents Freight operators MFSDD
Unplanned line blocking incidents no plan implemented oportunity
Unplanned line blocking incidents restriction changes daily
Unplanned line blocking incidents schedule planning issues VSTP
Unplanned line blocking incidents train plan issues
Unstaffed station non DOO train
Updating TRUST incidents
Vagrants at a station
Vandalism GSM-R cab based equipment
Vandalism GSM-R infrastructure or signal centre based equipment
Vandalism infrastructure but not cables
Vandalism of cable
Vandalism OHLE
Vandalism on non Network Rail infrastructure
Vandalism unexplained train coming to halt
VCB technical faults above solebar on passenger trains
Vegetation withine NR boundary obscured signs,signals or striking
Viaducts structural problems
Visibility caused by fog, snow or rain
Visibility sun flow chart (Q5.4)
Voltage surge external power supply
VSTP cross boundary delays
VSTP management if freight services during disruption cancellation
VSTP minor delays less than 5 mins and not reactionary
VSTP schedule error on Network Rail TSI created schedule
Wagons on a freight train fault
Waiting acceptance possessions
Waiting acceptance to network yard or terminal due to late running
Waiting acceptance yard/Siding off network freight terminals or yards
Waiting connections authorised by TOC but outside policy
Waiting connections not authorised
Waiting connections within policy (FOC)
Waiting connections within policy (none FOC)
Waiting customer traffic including documentation
Waiting platform,station congestion or platform change (reactionary)
Waiting to or from single line (reactionary)
Waiting to pass booked trains possessions
Waiting train crew
Waiting train preparation or completion of TOPS list/RT3973
Warning board for TSR/ESR defective or down
Water mains,gas or overhead power lines (national grid)
Delay Attribution Principles and Rules
June 2017
Clause
E5
B1.2
L1
O1.2.g
Si
G4.1.h
Sz
E2
E2
D5.2
E4
Q4.2
Sz
O1.5.a
R1.3.x
Si
E2
E4.3
M2
M2.6.d
M2.6.a
M2.7
M2.6.b
M2.6.e
M2.6.c
M2.6.c
St
B6.18
N2.y
G5.2.h
G5.2.i
Q4.1.b
Q4.1.a
O4.2.f
Q4.1.d
Q4.2
G1.2.d
F1.7.1.b
O1.2.g
Q5.11
Q5.10
O1.5.b
B6.16
L1.7
L1.4
L1
G1.3.c
P2.14
H4.2.c/d
H2
N2.g
N2.h
N2.f
N2.e
Sa
Sy
Sy
P2.16
J2
Sa
O3
Sx
Specific Codes
OP
QN
JD
IR
VA/RZ/FZ
ZU
FO
TO
ZW/ZX/ZY/ZZ
IH
IT
TO/FO
ZS
QM
TZ/FZ/OD
OD
QN
OD
T2
VA
VA/FZ
XB
XB
XR
XB
VB/AZ
M8
JP
JD
X1/XT/VR/FG/TW
XK
QN
PN
QN
ML
I7
Y*
TM/RK
RI
YL/OW
YL
AJ
YO
YE
I6
FE/TG/TH/YJ/YN
AC
IQ
XM
Index page 20 of 22
Subject
Water or ice on running railhead (Q5.9)
Water standing TOC/FOC directive not allowed to pass
Waterborne or road vehicles Bridge strike
Watering train at station
Weather additional running brake tests
Weather adherence to company driving standards and polices freight
Weather adherence to company driving standards and polices pass
Weather affecting most modes of transport passenger train delays
Weather asset overwhelmed
Weather below line speed restrictions potential frozen brakes
Weather delays associated with the effect of weather on the train
Weather economic mitigation
Weather effects no reasonable or viable economic mitigation
Weather fleet restriction from snow or ice
Weather impact on non Network Rail passenger lines
Weather infrastructure failure equipment outside design
Weather infrastructure failure equipment within design
Weather Network Rail speed restriction to protect infrastructure
Weather non severe fleet depots
Weather non severe fleet problems
Weather non severe snow,ice,frost affecting infrastructure equipment
Weather other forms of transport not meeting external criteria
Weather reduction in speed due to difficulty sighting signals
Weather reduction in speed sighting of structures,stations or boards
Weather reduction in speed sighting snow obscuring assets
Weather semaphore signals visibility (Q5.12.b)
Weather several operating restrictions
Weather severe fleet problems
Weather severe passenger charter excludable
Weather severe snow points failure heaters working as designed
Weather snow obscuring signals or signs
Weather station buildings affecting stopping trains
Weave engineering work planned not timetabled out of ROR/EAS
Weave planned engineering work not timetabled within ROR/EAS
Weed killer break down train failure or problem
Wet bed track defect
Wheel scrubbers faults on a passenger trains
WHEELCHEX no fault found Network Rail or wrong detection.
WILD No fault found Network Rail or wrong detection
WILD train borne safety system faults on apassenger train. Not cab
Wind flow chart weather
Wind obstructions on line including trees
Wind or temperature blanket speed restrictions per group standards
Wind screen wipers weather delays associated with the train
Wind wires down or damage to OHLE
Windows faults technical faults above solebar on train but not external
Wires down and other OHLE problems
Wires down due to high winds
Wires down or damage to OHLE due to wind
Worksites (possessions)
Wrong announcements, station staff
Wrong detection HABD PANCHEX WILD WHEELCHEX PanMon
Wrong routing signaller including agreed diversionary route.2 incidents
WSP brake and Brake system faults including wheel flats on a train
Yard congestion off network
Yard equipment breakdown or reduced capacity, off network
Yard staff shortage off network
Yard waiting customer traffic including documentation
Yellow plant on track machine (OTM)
Delay Attribution Principles and Rules
June 2017
Clause
F1.7.3.c
Q5.4.v
Q2
N2.m
Q5.12.e
Q5.4.ac
Q5.4.y
G1.4.a
Q5.9
Q5.12.a
G1.2.j
Q5.1
Q5.1
Q5.12.f
Q5.4.w
Q5.4.b
Q5.4.a
Q5.12.g
Q5.4.c
Q5.4.d
Si
Q5.2
Q5.12.b
Q5.12.c
Q5.12.d
Q5.4.aa
Q5.12
Q5.4.l
Q5.1
Sx
Q5.4.z
Q5.4.q
Sq
Sp
G1.4.b
Si
G1.2.g
R3.5
R3.5
G1.2.f
Q5.6
Q5.4.i
Q5.4.f
G1.2.j
Q5.4.e
G1.2.d
O4
O4.2.a
Q5.4.e
P2.12
Sr
R3.5
K5
G1.2.h
Sa
Sa
Sa
Sa
P1
Specific Codes
MP
VW/MW
XP
RD
VW/MW
FG
VR
VW
XT
MW/VW
MW
V*/X*
V*/X*
VW/MW
VZ
X*
I*/J*
MU
MW
IW
I*/J*/M*
TW/VR/FG
TW/VR/FG
XW
X1
VW
V*/X*
X9
XT
VZ
QB
PF
OM
IS
MR
IN
IN
MT
XW
X4
MW
XW
M8
XW
XW
R5
IN
OC
MN
AE
AH
AD
AJ
MV/I7/I5
Index page 21 of 22
GLOSSARY
ABS
ACI
ADD
ADL
ADRC
ARS
ATP
AWA
AWS
BTP
CaSL
C-DAS
CIS
COA
COT
CRT
CSR
DA
DAB
DAG
DAPR
DMU
DOO
DSD
DVD
DVT
EAS
EWAT
ECR
EMU
ERHC
ERTMS
ESR
ETCS
FDM
FMS
FOC
GCC
GSM-R
GZAM
HABD
HST
IBJ
IECC
IVRS
LC
LRA
LOM
LTP
LUL
MFSDD
MPV
MOM
NFF
NR
NRN
OCB
OHLE
Air brake system
Automatic code insertion (ARS)
Automatic dropper device (pantograph)
Accepted design limitations
Access dispute resolution committee
Automatic route setting
Automatic train protection
Autumn working arrangements
Automatic warning system
British Transport Police
Cancellations and significant lateness
Connected driver advisory system
Customer information system (PIS)
Change of aspect (signals)
Condition of track
Critical rail temperature
Cab secure radio
Delay attribution
Delay attribution board
Delay attribution guide now called DAPR
Delay attribution principles and rules
Diesel multiple unit
Driver only operation
Drivers safety device
Drivers Vigilance Device
Driving van trailer
Engineering access statement (ROR)
Extreme weather action team
Electrical control room
Electric multiple unit
Exceptional railhead conditions
European rail traffic management system
Emergency speed restriction
European train control system
Freight delivery measure
Fault management system
Freight operating company
Gauge corner cracking (RCF)
Global system mobile telecoms railways
Green zone access manager
Hot axle box detector
High speed train
Insulated block joint or rail joint (IRJ)
Integrated electronic control centre
Interactive voice radio system. Now GSM-R
Level crossing
Low rail adhesion
Local operations manager (NR position)
Long term planning (WTT) schedule
London underground
Management of freight services during Multi purpose vehicle
- disruption
Mobile Operations manager (NR position)
No fault found
Network Rail
National radio network.Replaced by GSM-R
Open or oil circuit breaker
Overhead line equipment (25 KV AC)
OTM
OTMR
PANCHEX
PGD
PIBS
PIS
PNB
PPM
PRM
PSB
RCF
RCM
REC
RETB
RHC
ROC
ROP
ROR
RRV
SB
SCC
SDO
SDR
SLW
SMART
SPAD
SPT
STANOX
SSI
SSO
STP
T&RS
TAC
TASS
TCA
TD
TDA
TDM
TIN
TIPLOC
TIS
TOC
TOPS
TPS
TPWS
TRTS
TRUST
TSI
TSR
TTP
VAR
VCB
VSTP
WHEELCHEX
WILD
WON
WSP
WTT
On track machine (Yellow plant)
On train monitoring recorder
Pantograph checking system. PanMon
Process and Guidance Document
Platform indicator beacon system
Passenger information system (CIS)
Personal need break.
Public performance measure
Persons with reduced mobility
Power signal box
Rolling contact fatigue (GCC)
Remote condition monitoring
Railway emergency call
Radio electronic token block
Railhead conditioning
Rail operating centre
Rules of the plan.Timetable planning rules
Rules of the route,now known as EAS
Road Rail Vehicle
Signal box
Signalling control centre
Selective door operation.
Simplified direct reporting
Single line working
Signal monitoring and reporting to TRUST
Signal passed at danger.
Signal post telephone
Station number used in TOPS
Solid state interlocking
Special stop order
Short term planning schedule
Traction and rolling stock
Track access contract
Tilt authorisation and speed supervision
Track circuit actuator
Train describer
TRUST delay attribution
Time division multiplex
TRUST incident number
Train planning location
Traction interlock switch
Train operating company
Total operations processing system
Train planning system
Train protection warning system
Train ready to start
Train running system: TOPS
Train service information
Temporary speed restriction
Timetable processor (ARS)
Variation schedule
Vacuum circuit breaker
Very short term planning schedule
Wheel checking system
Wheel impact load detector
Weekly operating notice
Wheel slide protection
Working timetable (LTP) schedule
Index and glossary compiled by Chris Scharf
Delay Attribution Principles and Rules
June 2017
Index page 22 of 22