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 | ||||||||
| supplier | coal | gas | nuclear † | renewable | other | CO2 * | nuclear waste * | disc. year |
|---|---|---|---|---|---|---|---|---|
| Angelic Energy | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Beam Energy | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Boost | 0.0 | 60.8 | 0.0 | 39.2 | 0.0 | 212 | 0.00000 | 2019 |
| Breeze | 8.9 | 60.3 | 18.1 | 8.9 | 3.8 | 327 | 0.00126 | 2019 |
| Bristol Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| British Gas | 4.0 | 29.0 | 9.0 | 56.0 | 2.0 | 157 | 0.00060 | 2019 |
| Bulb | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| CitizEn | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Co-operative Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2018 |
| E | 8.9 | 60.3 | 18.1 | 8.9 | 3.8 | 325 | 0.00127 | 2019 |
| E.ON | 7.2 | 48.6 | 14.6 | 26.6 | 3.0 | 262 | 0.00100 | 2019 |
| EBICo | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Economy 7 Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Ecotricity | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| EDF Energy | 5.2 | 10.8 | 72.1 | 11.7 | 0.2 | 87 | 0.00500 | 2019 |
| Energy SW | 0.0 | 61.0 | 0.0 | 39.0 | 0.0 | 212 | 0.00000 | 2019 |
| Engie | 6.0 | 43.0 | 13.0 | 35.0 | 3.0 | 234 | 0.00091 | 2019 |
| Enstroga | 8.9 | 60.3 | 18.1 | 8.9 | 3.8 | 325 | 0.00127 | 2019 |
| ESB Energy | 9.0 | 60.0 | 18.0 | 9.0 | 4.0 | 325 | 0.00130 | 2019 |
| Fairer Power | 0.0 | 61.0 | 0.0 | 39.0 | 0.0 | 212 | 0.00000 | 2019 |
| Flow Energy | 9.0 | 47.7 | 14.5 | 25.8 | 3.1 | 274 | 0.00100 | 2018 |
| Fosse Energy | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Foxglove Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Glide | 0.0 | 61.0 | 0.0 | 39.0 | 0.0 | 212 | 0.00000 | 2019 |
| Good Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Great North Energy | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Green Energy UK | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Green Network Energy | 4.5 | 30.9 | 9.3 | 53.4 | 1.9 | 166 | 0.00065 | 2019 |
| Green Star Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Gulf Gas & Power UK | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Igloo Energy | 4.0 | 28.0 | 8.0 | 58.0 | 2.0 | 149 | 0.00058 | 2019 |
| iSupplyEnergy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Leccy | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Lumo | 0.0 | 60.8 | 0.0 | 39.2 | 0.0 | 212 | 0.00000 | 2019 |
| M&S Energy | 7.0 | 65.0 | 5.0 | 21.0 | 2.0 | 310 | 0.00031 | 2018 |
| Nabuh Energy | 11.8 | 62.6 | 19.0 | 2.6 | 4.0 | 359 | 0.00133 | 2018 |
| npower | 7.2 | 48.9 | 14.7 | 26.2 | 3.1 | 264 | 0.00100 | 2019 |
| npower Northern | 8.5 | 57.9 | 17.4 | 12.6 | 3.6 | 312 | 0.00120 | 2019 |
| npower Yorkshire | 8.8 | 59.8 | 17.9 | 9.7 | 3.8 | 323 | 0.00130 | 2019 |
| Octopus Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Orbit Energy | 8.9 | 60.3 | 18.1 | 8.9 | 3.8 | 325 | 0.00127 | 2019 |
| Outfox the Market | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| OVO Energy | 0.0 | 61.0 | 0.0 | 39.0 | 0.0 | 212 | 0.00000 | 2019 |
| People's Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Peterborough Energy | 0.0 | 61.0 | 0.0 | 39.0 | 0.0 | 212 | 0.00000 | 2019 |
| Places for People Energy | 8.9 | 60.3 | 18.1 | 8.9 | 3.8 | 325 | 0.00130 | 2019 |
| Powershop | 7.2 | 48.9 | 14.7 | 26.2 | 3.1 | 264 | 0.00100 | 2019 |
| Pure Planet | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| RAM Energy | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Robin Hood Energy | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Sainsbury Energy | 7.2 | 48.9 | 14.7 | 26.2 | 3.1 | 264 | 0.00100 | 2019 |
| ScottishPower | 5.0 | 52.0 | 11.0 | 30.0 | 2.0 | 251 | 0.00080 | 2019 |
| Shell Energy | 8.7 | 59.2 | 17.8 | 10.5 | 3.7 | 320 | 0.00124 | 2019 |
| So Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Southend Energy | 0.0 | 61.0 | 0.0 | 39.0 | 0.0 | 212 | 0.00000 | 2019 |
| Spark Energy | 0.0 | 61.0 | 0.0 | 39.0 | 0.0 | 212 | 0.00000 | 2019 |
| SSE | 4.0 | 67.0 | 4.0 | 23.0 | 2.0 | 289 | 0.00030 | 2019 |
| Symbio | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Together Energy | 8.9 | 60.3 | 18.1 | 8.9 | 3.8 | 325 | 0.00130 | 2019 |
| Tonik Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Utilita | 9.0 | 60.0 | 18.0 | 9.0 | 4.0 | 325 | 0.00130 | 2019 |
| Utility Point | 8.9 | 60.3 | 18.1 | 8.9 | 3.8 | 325 | 0.00130 | 2019 |
| Utility Warehouse | 8.9 | 60.3 | 18.1 | 8.9 | 3.8 | 325 | 0.00130 | 2019 |
| White Rose Energy | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Yorkshire Energy | 0.0 | 0.0 | 0.0 | 100.0 | 0.0 | 0 | 0.00000 | 2019 |
| Your Energy Sussex | 0.6 | 3.8 | 1.1 | 94.3 | 0.2 | 20 | 0.00008 | 2019 |
| Residual Fuel Mix | 8.9 | 60.3 | 18.1 | 8.9 | 3.8 | 325 | 0.00127 | 2019 |
| UK Average | 5.2 | 41.4 | 18.7 | 32.8 | 1.9 | 225 | 0.00130 | 2019 |