Electricity Live

Great Britain’s electricity on Saturday 20 December 2025

On Saturday 20 December, demand averaged 32.5 GW. Renewables supplied 38%.

32.5GW AVERAGEWind11.26 GW33%Hydro0.84 GW2%Biomass2.34 GW7%Solar0.86 GW3%Gas9.48 GW28%Imports5.72 GW17%Nuclear3.56 GW10%32.5GW AVERAGE33%28%17%10%
Price
£87.45/MWh
Day average £87.45
Demand32.5GW
Generation 28.3Transfers 4.1
Fossil fuels28%
Renewables38%
Other34%
Carbon intensityModerate
127g/kWh
0Day average 127300
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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 Saturday 20 December 2025, wind supplied 33% of Great Britain’s electricity and gas 28%. Demand peaked at 39.0 GW at 17:50. Carbon intensity averaged 127 g/kWh and the price £87.45/MWh. Wind generation peaked at 15.5 GW at 20:30. Solar generation peaked at 5.1 GW at 11:30. Carbon intensity was lowest at 22:30 (81 g/kWh) and highest at 08:00 (160 g/kWh). The wholesale price ranged from £71.14/MWh at 23:30 to £102.65/MWh at 16:30. Wind made 40% 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 0.862.5%Wind 11.2633.1%Gas 9.4827.8%Hydro 0.842.5%Biomass 2.346.9%Nuclear 3.5610.4%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 32.5avgGeneration 28.3avgTransfers 4.1avg
The day in figurespeaks, averages, totals
Peak demand39.0GW · 17:50
Low 25.0 · 04:40Avg 32.50–40 GW
Made in Great Britain87%of demand
Generation 28.3Transfers 4.1 GW
Net imports95GWh
In
132 Out
37
Zero-carbon share58%of generation
Nuclear 13%Hydro 3%Wind 40%Solar 3%

Transfers · Sat 20 Dec

Interconnectors and storage

On Saturday 20 December 2025, Great Britain imported 132 GWh and exported 37 GWh through its interconnectors. The most came from France (83 GWh), and the most exports went to Denmark (14 GWh).

All interconnectors

Sat 20 Dec
Imported
132GWh
Exported
37GWh
Net in
95GWh
Average net flow
3.94GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.17GWExporting

In 1.9 GWhOut 6.1 GWh

Denmark

Viking Link

Average0.40GWExporting

In 4.7 GWhOut 14.4 GWh

France

IFA · IFA2 · ElecLink

Average3.47GWImporting

In 83.2 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.17GWImporting

In 7.5 GWhOut 3.4 GWh

Netherlands

BritNed

Average0.52GWExporting

In 0.7 GWhOut 13.1 GWh

Norway

North Sea Link

Average1.40GWImporting

In 33.5 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.18GWGenerating

Generated 5.6 GWhPumped 1.2 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.