Electricity Live

Great Britain’s electricity on Friday 21 March 2025

On Friday 21 March, demand averaged 31.7 GW. Renewables supplied 56%.

31.7GW AVERAGEWind16.95 GW50%Hydro0.23 GW1%Biomass0.49 GW1%Solar1.59 GW5%Gas3.86 GW11%Imports7.01 GW21%Nuclear3.63 GW11%31.7GW AVERAGE50%11%21%11%
Price
£91.52/MWh
Day average £91.52
Demand31.7GW
Generation 26.7Transfers 4.9
Fossil fuels11%
Renewables56%
Other33%
Carbon intensityLow
70g/kWh
0Day average 70300
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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 Friday 21 March 2025, wind supplied 50% of Great Britain’s electricity and gas 11%. Demand peaked at 37.9 GW at 12:25. Carbon intensity averaged 70 g/kWh and the price £91.52/MWh. Wind generation peaked at 20.2 GW at 12:40. Solar generation peaked at 6.0 GW at 11:30. Carbon intensity was lowest at 05:00 (55 g/kWh) and highest at 18:00 (94 g/kWh). The wholesale price ranged from £57.75/MWh at 14:30 to £121.31/MWh at 18:00. Wind made 63% 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 1.594.7%Wind 16.9550.2%Gas 3.8611.4%Hydro 0.230.7%Biomass 0.491.5%Nuclear 3.6310.7%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 31.7avgGeneration 26.7avgTransfers 4.9avg
The day in figurespeaks, averages, totals
Peak demand37.9GW · 12:25
Low 23.6 · 04:00Avg 31.70–40 GW
Made in Great Britain84%of demand
Generation 26.7Transfers 4.9 GW
Net imports125GWh
In
163 Out
38
Zero-carbon share84%of generation
Nuclear 14%Hydro 1%Wind 63%Solar 6%

Transfers · Fri 21 Mar

Interconnectors and storage

On Friday 21 March 2025, Great Britain imported 163 GWh and exported 38 GWh through its interconnectors. The most came from France (91 GWh), and the most exports went to Ireland (22 GWh).

All interconnectors

Fri 21 Mar
Imported
163GWh
Exported
38GWh
Net in
125GWh
Average net flow
5.20GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.50GWImporting

In 14.9 GWhOut 2.9 GWh

Denmark

Viking Link

Average0.57GWImporting

In 20.8 GWhOut 7.1 GWh

France

IFA · IFA2 · ElecLink

Average3.77GWImporting

In 90.5 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average0.83GWExporting

In 2.4 GWhOut 22.4 GWh

Netherlands

BritNed

Average0.34GWImporting

In 13.8 GWhOut 5.6 GWh

Norway

North Sea Link

Average0.85GWImporting

In 20.3 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.27GWPumping

Generated 5.6 GWhPumped 12.2 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.