Electricity Live

Great Britain’s electricity on Monday 21 April 2025

On Monday 21 April, demand averaged 26.7 GW. Renewables supplied 22%.

26.7GW AVERAGEWind4.17 GW15%Hydro0.14 GW1%Biomass1.76 GW6%Solar1.67 GW6%Gas10.38 GW38%Imports5.62 GW20%Nuclear3.78 GW14%26.7GW AVERAGE15%38%20%14%
Price
£93.07/MWh
Day average £93.07
Demand26.7GW
Generation 21.9Transfers 4.8
Fossil fuels38%
Renewables22%
Other41%
Carbon intensityModerate
173g/kWh
0Day average 173300
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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 21 April 2025, gas supplied 38% of Great Britain’s electricity and wind 15%. Demand peaked at 32.4 GW at 17:55. Carbon intensity averaged 173 g/kWh and the price £93.07/MWh. Wind generation peaked at 4.7 GW at 01:40. Solar generation peaked at 5.6 GW at 15:00. Carbon intensity was lowest at 00:30 (141 g/kWh) and highest at 20:00 (226 g/kWh). The wholesale price ranged from £79.96/MWh at 02:30 to £108.11/MWh at 19:00. Gas made 47% 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 1.676.1%Wind 4.1715.1%Gas 10.3837.7%Hydro 0.140.5%Biomass 1.766.4%Nuclear 3.7813.7%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 26.7avgGeneration 21.9avgTransfers 4.8avg
The day in figurespeaks, averages, totals
Peak demand32.4GW · 17:55
Low 19.6 · 04:20Avg 26.70–40 GW
Made in Great Britain82%of demand
Generation 21.9Transfers 4.8 GW
Net imports117GWh
In
134 Out
18
Zero-carbon share45%of generation
Nuclear 17%Hydro 1%Wind 19%Solar 8%

Transfers · Mon 21 Apr

Interconnectors and storage

On Monday 21 April 2025, Great Britain imported 134 GWh and exported 18 GWh through its interconnectors. The most came from France (71 GWh), and the most exports went to Ireland (10 GWh).

All interconnectors

Mon 21 Apr
Imported
134GWh
Exported
18GWh
Net in
117GWh
Average net flow
4.87GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.35GWImporting

In 9.4 GWhOut 1.0 GWh

Denmark

Viking Link

Average0.44GWImporting

In 11.9 GWhOut 1.2 GWh

France

IFA · IFA2 · ElecLink

Average2.96GWImporting

In 71.1 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.42GWExporting

In 0.0 GWhOut 10.1 GWh

Netherlands

BritNed

Average0.14GWImporting

In 8.5 GWhOut 5.2 GWh

Norway

North Sea Link

Average1.40GWImporting

In 33.5 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.09GWPumping

Generated 0.4 GWhPumped 2.6 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.