Fuel Mix Comparison

Compare the mix of fuels energy companies use to supply electricity

In the United Kingdom, all energy suppliers are legally obligated to disclose to their customers their fuel mix. This is the mix of fuels (gas, coal, nuclear, etc.) used to produce the electricity they supply to their customers

In addition, consumers must be informed about the amount of carbon dioxide emitted via electricity generation and /or the quantity of nuclear waste produced.

Fuel Mix Disclosure format

The format of Fuel Mix Disclosure is set out in The Electricity (Fuel Mix Disclosure) Regulations 2005. It requires the information to be disclosed in tables as percentages, so it is easily understood by anyone accessing it.

The environmental impact data, relevant to Paragraph 11 of the Regulations, is to be described in g/kWh.
Here are examples of Fuel Mix and Environmental Impact Disclosure:

Fuel mix (%)

Coal 8.9
Natural Gas 60.3
Nuclear 18.1
Renewables 8.9
Other Fuels 3.8

High-level radioactive waste

0.007 g/kWh

Carbon Dioxide Emissions

Energy Source g/kWh
Coal 920
Natural Gas 349
Nuclear 0
Renewables 0
Other 871
Overall average 208

Energy Companies' Fuel Mix

To easily compare the mix of fuels used by energy companies, please refer to the data below. We have calculated the percentage of renewable vs. non-renewable sources so you can determine the best supplier for you.  If you are interested in going with a 100% renewable energy supplier then you can check out our Guide to Green Energy Companies.

Fuel Mix (%) Disclosure Data: latest
suppliercoalgasnuclear renewableotherCO2 *nuclear waste *disc. year
Angelic Energy0.63.81.194.30.2200.000082019
Beam Energy0.63.81.194.30.2200.000082019
Boost0.060.80.039.20.02120.000002019
Breeze8.960.318.18.93.83270.001262019
Bristol Energy0.00.00.0100.00.000.000002019
British Gas4.029.09.056.02.01570.000602019
Bulb0.00.00.0100.00.000.000002019
CitizEn0.63.81.194.30.2200.000082019
Co-operative Energy0.00.00.0100.00.000.000002018
E8.960.318.18.93.83250.001272019
E.ON7.248.614.626.63.02620.001002019
EBICo0.63.81.194.30.2200.000082019
Economy 7 Energy0.00.00.0100.00.000.000002019
Ecotricity0.00.00.0100.00.000.000002019
EDF Energy5.210.872.111.70.2870.005002019
Energy SW0.061.00.039.00.02120.000002019
Engie6.043.013.035.03.02340.000912019
Enstroga8.960.318.18.93.83250.001272019
ESB Energy9.060.018.09.04.03250.001302019
Fairer Power0.061.00.039.00.02120.000002019
Flow Energy9.047.714.525.83.12740.001002018
Fosse Energy0.63.81.194.30.2200.000082019
Foxglove Energy0.00.00.0100.00.000.000002019
Glide0.061.00.039.00.02120.000002019
Good Energy0.00.00.0100.00.000.000002019
Great North Energy0.63.81.194.30.2200.000082019
Green Energy UK0.00.00.0100.00.000.000002019
Green Network Energy4.530.99.353.41.91660.000652019
Green Star Energy0.00.00.0100.00.000.000002019
Gulf Gas & Power UK0.00.00.0100.00.000.000002019
Igloo Energy4.028.08.058.02.01490.000582019
iSupplyEnergy0.00.00.0100.00.000.000002019
Leccy0.63.81.194.30.2200.000082019
Lumo0.060.80.039.20.02120.000002019
M&S Energy7.065.05.021.02.03100.000312018
Nabuh Energy11.862.619.02.64.03590.001332018
npower7.248.914.726.23.12640.001002019
npower Northern8.557.917.412.63.63120.001202019
npower Yorkshire8.859.817.99.73.83230.001302019
Octopus Energy0.00.00.0100.00.000.000002019
Orbit Energy8.960.318.18.93.83250.001272019
Outfox the Market0.00.00.0100.00.000.000002019
OVO Energy0.061.00.039.00.02120.000002019
People's Energy0.00.00.0100.00.000.000002019
Peterborough Energy0.061.00.039.00.02120.000002019
Places for People Energy8.960.318.18.93.83250.001302019
Powershop7.248.914.726.23.12640.001002019
Pure Planet0.00.00.0100.00.000.000002019
RAM Energy0.63.81.194.30.2200.000082019
Robin Hood Energy0.63.81.194.30.2200.000082019
Sainsbury Energy7.248.914.726.23.12640.001002019
ScottishPower5.052.011.030.02.02510.000802019
Shell Energy8.759.217.810.53.73200.001242019
So Energy0.00.00.0100.00.000.000002019
Southend Energy0.061.00.039.00.02120.000002019
Spark Energy0.061.00.039.00.02120.000002019
SSE4.067.04.023.02.02890.000302019
Symbio0.00.00.0100.00.000.000002019
Together Energy8.960.318.18.93.83250.001302019
Tonik Energy0.00.00.0100.00.000.000002019
Utilita9.060.018.09.04.03250.001302019
Utility Point8.960.318.18.93.83250.001302019
Utility Warehouse8.960.318.18.93.83250.001302019
White Rose Energy0.63.81.194.30.2200.000082019
Yorkshire Energy0.00.00.0100.00.000.000002019
Your Energy Sussex0.63.81.194.30.2200.000082019
Residual Fuel Mix8.960.318.18.93.83250.001272019
UK Average5.241.418.732.81.92250.001302019