Fuel Mix of UK Domestic Electricity Suppliers

Fuel Mix Disclosure Data: latest
supplier coal gas nuc- lear renew- able other CO2 nuclear waste* disc. year
British Gas 11.0 33.0 31.0 23.0 2.0 0.240 0.00220 2015
Co-operative Energy 38.7 36.2 14.2 4.6 6.3 0.528 0.00100 2015
e.on 38.6 36.2 14.2 4.7 6.3 0.527 0.00100 2015
Ecotricity 0.0 0.0 0.0 100.0 0.0 0.000 0.00000 2015
EDF Energy 22.6 6.1 54.9 16.3 0.1 0.229 0.00380 2015
Extra Energy 28.0 33.0 15.0 19.0 5.0 0.410 0.00100 2015
First:Utility 38.7 36.2 14.2 4.6 6.3 0.528 0.00100 2015
Flow Energy 38.7 36.2 14.2 4.6 6.3 0.368 0.00160 2015
Good Energy 0.0 0.0 0.0 100.0 0.0 0.000 0.00000 2015
Green Energy UK 0.0 57.0 0.0 43.0 0.0 0.190 0.00000 2015
Green Star Energy 0.1 0.1 0.0 99.8 0.0 0.002 0.00001 2015
iSupplyEnergy 38.7 36.2 14.2 4.6 6.3 0.528 0.00100 2015
LoCO2 Energy 0.0 60.0 0.0 40.0 0.0 0.240 0.00000 2014
npower/RWE 21.0 59.0 2.0 17.0 1.0 0.418 0.00013 2015
OVO Energy 0.0 84.6 0.0 15.4 0.0 0.321 0.00000 2015
ScottishPower 46.4 30.3 2.3 20.0 1.0 0.540 0.00020 2015
Spark Energy 46.8 27.1 8.4 11.9 5.8 0.579 0.00070 2014
SSE 31.0 27.0 3.0 37.0 2.0 0.398 0.00023 2015
Utilita 47.0 27.0 8.0 12.0 6.0 0.582 0.00064 2014
UK Average 26.7 29.7 22.2 19.3 2.1 0.360 0.00160 2015

CO2 emissions are in kg/kWh; nuclear waste relates to high-level waste in g/kWh.

View: latest 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 

* The weighted aggregate for nuclear power’s share of fuel mix is only about two-thirds of the UK “average” figure. This is probably because nuclear power is being supplied disproportionately to industry rather than domestic customers, partly because of nuclear’s proportionately higher night-time output due to its inability to load follow (adjust its output with varying demand). Aggregated coal and gas figures are both slightly higher than the average figures.

Other impacts

Coal power plants also emit sulphur dioxide which leads to acid rain, as well as other pollutants.

Note that the figures for carbon dioxide emissions are for emissions directly related to electricity generation and take no account of lifecycle emisions.

For nuclear power in particular there are carbon dioxide emissions related to construction and the mining and processing of the uranium fuel.

The nuclear waste figure does not include intermediate and low-level nuclear waste. Though less radioactive, these lower level wastes are created in much larger volumes, are still dangerous, and represent a disposal problem.

The “big 6” suppliers

British Gas (includes Centrica and Scottish Gas)
EDF Energy (includes London Energy, Seeboard and SWEB Energy)
e.on (includes Amerada, East Midlands Electricity, Eastern Electricity, Midlands Gas, Norweb Energy, Powergen, Sterling Gas, Tesco Energy and TXU Energi)
npower/RWE (includes Calortex, Daily Telegraph, Independent Energy, MEB, Midlands Electricity, National Power, Npower Limited, Npower Northern Limited, Npower Yorkshire Limited, Npower Direct Limited and York Gas)
SSE (Scottish & Southern Energy) (includes Atlantic Electric and Gas, Scottish Hydro-Electric, Southern Electric, and SWALEC)
ScottishPower (includes AA, Beacon, Ideal and Lloyds Ideal)

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