Fuel mix disclosure data table
Updated 2 May 2024
© Crown copyright 2024
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This publication is available at https://www.gov.uk/government/publications/fuel-mix-disclosure-data-table/fuel-mix-disclosure-data-table
The information below constitutes the ‘fuel mix 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.
The data are for the disclosure period 1 April 2022 to 31 March 2023.
1. Transmission and distribution loss factor for 2022 to 2023
(Not to be applied to embedded generation.)
1.1049
For 2023/24, as the timing of the current publication in August is after the REGO long stop date we are publishing an indicative estimate to aid with planning.
The transmission and distribution loss factor for 2023/24 is estimated to be around 1.105.
In line with continued efforts to provide a better estimate of the final loss factor, this estimate is calculated as a three year average ([Revised loss factor 2021/22] + [Revised loss factor 2022/23] + [Provisional loss factor 2023/24])/3.
We would welcome comments to electricitystatistics@energysecurity.gov.uk and plan to seek further input on the process later this year.
2. Residual fuel mix
(Relevant to paragraph 10 of the Regulations.)
| Energy Source | % |
|---|---|
| Coal | 7.0 |
| Natural Gas | 73.5 |
| Nuclear | 1.7 |
| Renewables | 12.2 |
| Other fuels | 5.6 |
3. Environmental impact
(Relevant to paragraph 11 of the Regulations.)
Carbon dioxide emissions estimate for UK generation mix, by fuel [footnote 1]
| Energy Source | g/kWh |
|---|---|
| Coal | 945 |
| Natural Gas | 371 |
| Nuclear | 0 |
| Renewables | 0 |
| Other | 795 |
| Overall average | 186 |
High-level radioactive waste
0.007 g/kWh
4. UK fuel mix in 2022 to 2023
(For comparison.) [footnote 2]
| Energy Source | % |
|---|---|
| Coal | 3.4 |
| Natural Gas | 39.3 |
| Nuclear | 13.9 |
| Renewables | 40.8 |
| Other | 2.6 |
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Data relates only to generator emissions in the operational phase and does not include emissions related to the fuel supply chain or maintenance activities. ↩
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The UK fuel mix here is on an electricity supplied basis, including an estimated allocation for imports using the European Attribute Mix. The period covered is April 2022 to March 2023. ↩