Electricity Live

Great Britain’s electricity on Thursday 21 August 2025

On Thursday 21 August, demand averaged 27.2 GW. Renewables supplied 28%.

27.2GW AVERAGEWind5.28 GW18%Hydro0.31 GW1%Biomass2.62 GW9%Solar2.51 GW9%Gas8.98 GW31%Imports6.60 GW23%Nuclear2.99 GW10%27.2GW AVERAGE18%9%9%31%23%10%
Price
£77.97/MWh
Day average £77.97
Demand27.2GW
Generation 22.7Transfers 4.5
Fossil fuels31%
Renewables28%
Other42%
Carbon intensityModerate
156g/kWh
0Day average 156300
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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 Thursday 21 August 2025, gas supplied 31% of Great Britain’s electricity and wind 18%. Demand peaked at 32.4 GW at 10:35. Carbon intensity averaged 156 g/kWh and the price £77.97/MWh. Wind generation peaked at 7.3 GW at 03:30. Solar generation peaked at 7.5 GW at 14:30. Carbon intensity was lowest at 10:30 (121 g/kWh) and highest at 20:30 (194 g/kWh). The wholesale price ranged from £65.53/MWh at 11:00 to £98.53/MWh at 20:30. Gas made 40% of the electricity generated in Great Britain, compared with 32% across 2025.

Charts

Generation, demand, price and carbon

Generation by sourceGW · daily average below
Solar 2.518.6%Wind 5.2818.0%Gas 8.9830.7%Hydro 0.311.1%Biomass 2.628.9%Nuclear 2.9910.2%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 27.2avgGeneration 22.7avgTransfers 4.5avg
The day in figurespeaks, averages, totals
Peak demand32.4GW · 10:35
Low 20.0 · 05:00Avg 27.20–40 GW
Made in Great Britain83%of demand
Generation 22.7Transfers 4.5 GW
Net imports110GWh
In
158 Out
48
Zero-carbon share49%of generation
Nuclear 13%Hydro 1%Wind 23%Solar 11%

Transfers · Thu 21 Aug

Interconnectors and storage

On Thursday 21 August 2025, Great Britain imported 158 GWh and exported 48 GWh through its interconnectors. The most came from France (94 GWh), and the most exports went to Ireland (36 GWh).

All interconnectors

Thu 21 Aug
Imported
158GWh
Exported
48GWh
Net in
110GWh
Average net flow
4.58GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.45GWImporting

In 11.2 GWhOut 0.2 GWh

Denmark

Viking Link

Average0.37GWImporting

In 14.6 GWhOut 5.6 GWh

France

IFA · IFA2 · ElecLink

Average3.90GWImporting

In 93.6 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average1.49GWExporting

In 0.0 GWhOut 35.8 GWh

Netherlands

BritNed

Average0.29GWImporting

In 13.1 GWhOut 6.0 GWh

Norway

North Sea Link

Average1.05GWImporting

In 25.1 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.05GWPumping

Generated 0.9 GWhPumped 2.0 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.