Electricity Live

Great Britain’s electricity on Sunday 21 December 2025

On Sunday 21 December, demand averaged 31.6 GW. Renewables supplied 36%.

31.6GW AVERAGEWind11.18 GW33%Hydro0.83 GW2%Biomass2.69 GW8%Solar0.19 GW1%Gas8.59 GW26%Imports6.68 GW20%Nuclear3.48 GW10%31.6GW AVERAGE33%8%26%20%10%
Price
£78.94/MWh
Day average £78.94
Demand31.6GW
Generation 27.0Transfers 4.6
Fossil fuels26%
Renewables36%
Other38%
Carbon intensityModerate
125g/kWh
0Day average 125300
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Recorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hour

Key moments

On Sunday 21 December 2025, wind supplied 33% of Great Britain’s electricity and gas 26%. Demand peaked at 38.8 GW at 17:40. Carbon intensity averaged 125 g/kWh and the price £78.94/MWh. Wind generation peaked at 14.6 GW at 23:55. Solar generation peaked at 1.3 GW at 11:30. Carbon intensity was lowest at 23:00 (60 g/kWh) and highest at 12:00 (163 g/kWh). The wholesale price ranged from £70.43/MWh at 00:00 to £87.75/MWh at 07:30. Wind made 41% of the electricity generated in Great Britain, compared with 35% across 2025.

Charts

Generation, demand, price and carbon

Generation by sourceGW · daily average below
Solar 0.190.6%Wind 11.1833.2%Gas 8.5925.5%Hydro 0.832.5%Biomass 2.698.0%Nuclear 3.4810.4%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 31.6avgGeneration 27.0avgTransfers 4.6avg
The day in figurespeaks, averages, totals
Peak demand38.8GW · 17:40
Low 23.7 · 05:50Avg 31.60–40 GW
Made in Great Britain85%of demand
Generation 27.0Transfers 4.6 GW
Net imports113GWh
In
158 Out
45
Zero-carbon share58%of generation
Nuclear 13%Hydro 3%Wind 41%Solar 1%

Transfers · Sun 21 Dec

Interconnectors and storage

On Sunday 21 December 2025, Great Britain imported 158 GWh and exported 45 GWh through its interconnectors. The most came from France (84 GWh), and the most exports went to Ireland (33 GWh).

All interconnectors

Sun 21 Dec
Imported
158GWh
Exported
45GWh
Net in
113GWh
Average net flow
4.72GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.68GWImporting

In 16.4 GWhOut 0.0 GWh

Denmark

Viking Link

Average0.23GWImporting

In 12.7 GWhOut 7.1 GWh

France

IFA · IFA2 · ElecLink

Average3.50GWImporting

In 83.9 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average1.36GWExporting

In 0.0 GWhOut 32.7 GWh

Netherlands

BritNed

Average0.27GWImporting

In 11.8 GWhOut 5.3 GWh

Norway

North Sea Link

Average1.40GWImporting

In 33.5 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.08GWPumping

Generated 2.1 GWhPumped 3.9 GWh

All cards share one scale, so you can compare their heights. Each country can have more than one cable.

Download the 5-minute data for this day: CSV · JSON. See what the figures mean.