Electricity Live

Great Britain’s electricity on Monday 15 December 2025

On Monday 15 December, demand averaged 34.9 GW. Renewables supplied 36%.

34.9GW AVERAGEWind12.38 GW33%Hydro0.86 GW2%Biomass2.35 GW6%Solar0.30 GW1%Gas11.83 GW32%Imports5.87 GW16%Nuclear3.60 GW10%34.9GW AVERAGE33%32%16%10%
Price
£80.15/MWh
Day average £80.15
Demand34.9GW
Generation 31.3Transfers 3.6
Fossil fuels32%
Renewables36%
Other32%
Carbon intensityModerate
140g/kWh
0Day average 140300
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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 Monday 15 December 2025, wind supplied 33% of Great Britain’s electricity and gas 32%. Demand peaked at 41.9 GW at 12:15. Carbon intensity averaged 140 g/kWh and the price £80.15/MWh. Wind generation peaked at 18.9 GW at 00:20. Solar generation peaked at 2.1 GW at 12:00. Carbon intensity was lowest at 00:00 (40 g/kWh) and highest at 16:30 (192 g/kWh). The wholesale price ranged from £54.83/MWh at 03:30 to £107.12/MWh at 17:30. 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 0.300.8%Wind 12.3833.3%Gas 11.8331.8%Hydro 0.862.3%Biomass 2.356.3%Nuclear 3.609.7%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 34.9avgGeneration 31.3avgTransfers 3.6avg
The day in figurespeaks, averages, totals
Peak demand41.9GW · 12:15
Low 24.4 · 04:05Avg 34.90–60 GW
Made in Great Britain90%of demand
Generation 31.3Transfers 3.6 GW
Net imports83GWh
In
133 Out
49
Zero-carbon share55%of generation
Nuclear 12%Hydro 3%Wind 40%Solar 1%

Transfers · Mon 15 Dec

Interconnectors and storage

On Monday 15 December 2025, Great Britain imported 133 GWh and exported 49 GWh through its interconnectors. The most came from France (68 GWh), and the most exports went to Ireland (35 GWh).

All interconnectors

Mon 15 Dec
Imported
133GWh
Exported
49GWh
Net in
83GWh
Average net flow
3.48GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.17GWExporting

In 2.5 GWhOut 6.5 GWh

Denmark

Viking Link

Average1.06GWImporting

In 25.5 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average2.84GWImporting

In 68.2 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average1.47GWExporting

In 0.0 GWhOut 35.3 GWh

Netherlands

BritNed

Average0.18GWExporting

In 2.8 GWhOut 7.2 GWh

Norway

North Sea Link

Average1.40GWImporting

In 33.5 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.11GWGenerating

Generated 8.3 GWhPumped 5.7 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.