Fuel Mix Disclosure Guide
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 |
| 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.
British Gas Fuel Mix
E.On Fuel Mix
EDF Energy Fuel Mix
nPower Fuel Mix
Scottish Power Fuel Mix
SSE Fuel Mix
Corona Fuel Mix
Engie Fuel Mix
Gazprom Fuel Mix
Octopus Energy Fuel Mix
Opus Fuel Mix
Utilita Fuel Mix
*The data above has directly been sourced from the supplier's websites.
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