Electricity Live

Great Britain’s electricity on Saturday 4 October 2025

On Saturday 4 October, demand averaged 29.0 GW. Renewables supplied 73%.

29.0GW AVERAGEWind19.76 GW66%Hydro0.48 GW2%Biomass0.49 GW2%Solar1.71 GW6%Gas3.47 GW12%Imports1.73 GW6%Nuclear2.51 GW8%29.0GW AVERAGE66%12%8%
Price
£9.57/MWh
Day average £9.57
Demand29.0GW
Generation 28.4Transfers 0.6
Fossil fuels12%
Renewables73%
Other16%
Carbon intensityLow
62g/kWh
0Day average 62300
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Recorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hourRecorded half-hour

Records set on this day

All records

Key moments

On Saturday 4 October 2025, wind supplied 66% of Great Britain’s electricity and gas 12%. Demand peaked at 34.5 GW at 19:05. Carbon intensity averaged 62 g/kWh and the price £9.57/MWh. Wind generation peaked at 22.3 GW at 18:15. Solar generation peaked at 6.3 GW at 10:30. Carbon intensity was lowest at 15:30 (49 g/kWh) and highest at 07:00 (79 g/kWh). The wholesale price ranged from −£1.71/MWh at 04:30 to £26.03/MWh at 00:00. The price was below zero for 1.5 hours. Wind made 70% 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 1.715.7%Wind 19.7665.5%Gas 3.4711.5%Hydro 0.481.6%Biomass 0.491.6%Nuclear 2.518.3%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 29.0avgGeneration 28.4avgTransfers 0.6avg
The day in figurespeaks, averages, totals
Peak demand34.5GW · 19:05
Low 21.5 · 05:40Avg 29.00–40 GW
Made in Great Britain98%of demand
Generation 28.4Transfers 0.6 GW
Net imports16GWh
In
37 Out
21
Zero-carbon share86%of generation
Nuclear 9%Hydro 2%Wind 70%Solar 6%

Transfers · Sat 4 Oct

Interconnectors and storage

On Saturday 4 October 2025, Great Britain imported 37 GWh and exported 21 GWh through its interconnectors. The most came from Ireland (8 GWh), and the most exports went to France (9 GWh).

All interconnectors

Sat 4 Oct
Imported
37GWh
Exported
21GWh
Net in
16GWh
Average net flow
0.65GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.22GWImporting

In 7.6 GWhOut 2.3 GWh

Denmark

Viking Link

Average0.28GWImporting

In 7.5 GWhOut 0.9 GWh

France

IFA · IFA2 · ElecLink

Average0.14GWExporting

In 6.2 GWhOut 9.4 GWh

Ireland

Moyle · East–West · Greenlink

Average0.33GWImporting

In 7.9 GWhOut 0.1 GWh

Netherlands

BritNed

Average0.09GWImporting

In 6.1 GWhOut 4.0 GWh

Norway

North Sea Link

Average0.12GWExporting

In 1.8 GWhOut 4.8 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.05GWPumping

Generated 4.4 GWhPumped 5.6 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.