All energy suppliers in the Great Britain) are required to provide information about the mix of fuels they use to generate the electricity they supply to their customers. They also need to disclose the environmental impact of this fuel mix.
This information is known as the Fuel Mix Disclosure and is published annually. Aggregate data for the UK is published by the Department of Business, Energy & Industrial Strategy (BEIS).
The requirement on all electricity suppliers in Great Britain to disclose to their customers the mix of fuels used to generate the electricity they sell was introduced in the Electricity (Fuel Mix Disclosure) Regulations 2005 (SI 2005 No. 391). The disclosure period runs from 1 April in one year through to 31 March in the following year. Energy suppliers must disclose this information by 1 October annually. The requirement only applies where electricity is supplied for a full disclosure period. So, an energy supplier that began supplying electricity part way through a year is exempt from the disclosure in their first year of operation.
Shown below is the aggregated UK (excluding Northern Ireland) Fuel Mix Disclosure for the latest reporting year. We will update this page with the latest Fuel Mix Disclosures as they become available.
UK Fuel Mix Disclosure 2017/2018
The table below shows the Bulb Energy Fuel Mix Disclosure for the period 1 April 2017 to 31 March 2018.
|Energy Source||UK Average
|Energy Source||Carbon Dioxide Emmissions
|CO2 emissions - overall average||225|
|High-level radioactive waste (g/kWh)||0.007|
Editor’s note. The BEIS figures for High-level radioactive waste at 0.007 g/kWh don’t seem to agree with other industry data. I know this sounds odd as the BEIS figures are supposed to be the official record. However we will look into it and unravel the mystery as soon as we can. Maybe someone pressed the wrong button on their calculator….?
Energy supplier fuel mix disclosures
The figures above are aggregated data across al energy suppliers in Great Britain. The Fuel Mix Disclosure of individual energy suppliers will vary. To see how individual energy suppliers compare on fuel mix and carbon emissions, follow the links below.