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Research and analysis

Fuel mix disclosure data table

The data are for the disclosure period 1 April 2025 to 31 March 2026.

Updates to this page

From:
Department for Energy Security and Net Zero
Published:
1 February 2005
Last updated:
3 August 2026
Show all updates

  1. Published the fuel mix disclosure data table for 2025 to 2026.

  2. Updated the fuel mix disclosure data table to include a transmission and distribution loss factor estimate to aid with planning for 2025/26.

  3. Updated with new data for 2024 / 2025 reporting period.

  4. The fuel mix disclosure data table has been updated to include a transmission and distribution loss factor estimate to aid with planning for 2024 to 2025.

  5. Updated with new data for 2023/24 reporting period.

  6. Updated 'Fuel mix disclosure data table' to include an indicative estimate to aid with planning for 2023/24.

  7. We have published the data for the disclosure period 1 April 2022 to 31 March 2023.

  8. Data table updated with the provisional loss factor for electricity suppliers to use until the next full publication in August 2023.

  9. Added fuel mix disclosure data for 2021 to 2022.

  10. Added an indicative estimate for 2021 to 2022 to aid planning.

  11. Added fuel mix disclosure data for 2020 to 2021.

  12. Updated to add estimated loss factor for 2020/21 and to add note to table 3 – Environmental Regulations.

  13. Fuel mix disclosure data for 2019 to 2020.

  14. Fuel mix disclosure data for 2018 to 2019.

  15. The UK fuel mix figures (Table 4) have been updated to 2 decimal places to address rounding.

  16. The fuel mix disclosure residual published on 1 August 2018 has been revised to correct an error in the original calculation.

  17. Fuel mix disclosure data for 2017 to 2018.

  18. Residual fuel mix figures updated following revisions to the original data supplied by industry.

  19. Fuel mix disclosure data for 2016 to 2017.

  20. Updated fuel disclosure mix table.

  21. Fuel mix disclosure data table.

  22. Latest fuel mix disclosure table published.

  23. Published this year's figures.

  24. First published.

Documents

Fuel mix disclosure data table, 2025 to 2026

PDF, 207 KB, 2 pages

Fuel mix disclosure data table, 2025 to 2026

HTML

Details

The information constitutes the ‘fuel mix data disclosure data table’, as defined in the Electricity (Fuel Mix Disclosure) Regulations 2005.

View guidance from Ofgem about Fuel Mix Disclosure. Under the new licences introduced on 1 August 2007, fuel mix disclosure is supply licence condition 21 in place of licence condition 30A quoted in the guidelines.

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