UK Monthly Clean Dark Spread Closing Prices - 30 Days The assumed gross margin (per MWh) at market close prices achieved by coal-fired power plant operating at 35% efficiency after the cost of carbon (EU ETS Carbon Allowances) from the previous 30 trading days. Prices are for monthly contracts. Dark spreads tend to narrow when coal plant is setting the marginal price on the network and widen if for example, gas plant is setting the price. This data is updated around 5am on the day after a working day (Tuesday - Saturday). Data Item Jun-17 Jul-17 Aug-17 05/05/2017 -5.475 -4.750 No Data 08/05/2017 -6.220 -5.140 No Data 09/05/2017 -5.825 -4.785 No Data 10/05/2017 -6.035 -5.070 No Data 11/05/2017 -6.140 -5.245 No Data 12/05/2017 -6.165 -5.405 No Data 15/05/2017 -6.050 -5.225 No Data 16/05/2017 -6.130 -5.520 No Data 17/05/2017 -6.075 -5.410 No Data 18/05/2017 -6.210 -5.520 No Data 19/05/2017 -6.575 -5.935 No Data 22/05/2017 -6.510 -6.560 No Data 23/05/2017 -7.230 -6.375 No Data 24/05/2017 -6.930 -6.140 No Data 25/05/2017 -7.350 -6.425 No Data 26/05/2017 -6.940 -6.130 No Data disclaimer and legal notice This document and the SourceDaily portal are provided by SmartestEnergy on request only and without charge. SmartestEnergy considers that the information cited and the opinions given in this document and the SourceDaily portal are sound, however recipients must rely upon their own skill and judgement when making use of any of the information and opinions presented. The data provided in this document and on the SourceDaily portal are protected under copyright. Copying, re-using, redistributing or otherwise misusing this data is not permitted. Data provided by Spectron Group and Elexon. Read the full disclaimer on the SourceDaily website. Page 1 of 2 smartestenergy.com/Source-Daily Data Item Jun-17 Jul-17 Aug-17 30/05/2017 -6.810 -6.020 No Data 31/05/2017 -6.680 -5.855 No Data 01/06/2017 No Data -6.270 -6.430 02/06/2017 No Data -6.335 -6.590 05/06/2017 No Data -6.790 -6.985 06/06/2017 No Data -7.125 -7.200 07/06/2017 No Data -6.850 -6.925 08/06/2017 No Data -6.425 -6.620 09/06/2017 No Data -6.880 -6.980 12/06/2017 No Data -7.620 -7.680 13/06/2017 No Data -8.325 -7.600 14/06/2017 No Data -8.330 -8.400 15/06/2017 No Data -8.905 -8.535 16/06/2017 No Data -8.360 -8.090 disclaimer and legal notice This document and the SourceDaily portal are provided by SmartestEnergy on request only and without charge. SmartestEnergy considers that the information cited and the opinions given in this document and the SourceDaily portal are sound, however recipients must rely upon their own skill and judgement when making use of any of the information and opinions presented. The data provided in this document and on the SourceDaily portal are protected under copyright. Copying, re-using, redistributing or otherwise misusing this data is not permitted. Data provided by Spectron Group and Elexon. Read the full disclaimer on the SourceDaily website. Page 2 of 2 smartestenergy.com/Source-Daily
© Copyright 2026 Paperzz