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 22.0 31.0 31.0 15.0 3.0 0.339 0.00248 2014
Co-operative Energy 17.0 9.8 3.1 68.0 2.1 0.210 0.00030 2014
e.on 46.7 27.1 8.4 12.0 5.8 0.578 0.00100 2014
Ecotricity 18.5 10.9 1.7 67.5 1.4 0.219 0.00014 2014
EDF Energy 26.8 3.5 56.1 13.5 0.1 0.259 0.00450 2014
First:Utility 46.8 27.1 8.4 11.9 5.8 0.579 0.00070 2014
Flow Energy 46.8 27.1 8.4 11.9 5.8 0.579 0.00070 2014
Good Energy 0.0 0.0 0.0 100.0 0.0 0.000 0.00000 2014
Green Energy UK 0.0 45.0 0.0 55.0 0.0 0.190 0.00000 2014
Green Star Energy 3.0 2.0 0.0 95.0 0.0 0.032 0.00010 2014
iSupplyEnergy 46.8 27.1 8.4 11.9 5.8 0.579 0.00070 2014
LoCO2 Energy 0.0 54.0 0.0 46.0 0.0 0.213 0.00000 2013
npower/RWE 31.0 50.0 2.0 15.0 2.0 0.492 0.00020 2014
OVO Energy 39.3 22.7 7.0 26.1 4.9 0.486 0.00060 2014
ScottishPower 48.6 32.6 1.1 16.9 0.8 0.579 0.00010 2014
Spark Energy 52.3 30.7 4.7 8.3 4.0 0.619 0.00040 2013
SSE 44.0 28.0 2.0 24.0 2.0 0.525 0.00015 2014
Utilita 31.1 34.9 29.2 0.8 4.0 0.424 0.00300 2009
UK Average 34.0 25.6 21.6 16.7 2.1 0.420 0.00173 2014

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

View: latest 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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