Electricity Live

Daily record

Great Britain’s electricity on Monday 21 September 2026

On Monday 21 September 2026, gas supplied 30% of Great Britain’s electricity and wind 15%. Demand peaked at 34.9 GW at 14:25. Carbon intensity averaged 162 g/kWh and the price £167.07/MWh.

Key moments

  • Wind generation peaked at 6.8 GW at 00:00.
  • Solar generation peaked at 10.7 GW at 13:30.
  • Carbon intensity was lowest at 13:00 (106 g/kWh) and highest at 19:00 (216 g/kWh).
  • The wholesale price ranged from £134.98/MWh at 04:30 to £207.07/MWh at 18:00.
  • Gas made 38% of the electricity generated in Great Britain, compared with 28% across 2026 so far.

Charts

Generation, demand, price and carbon

Generation by sourceGW · daily average below
Solar 3.0710.3%Wind 4.6115.5%Gas 8.9430.1%Hydro 0.521.8%Biomass 3.0010.1%Nuclear 3.4711.7%
Price£/MWh
Carbon intensitygCO₂/kWh
Demand and generationGW
Demand 28.4avgGeneration 23.6avgTransfers 4.8avg
The day in figurespeaks, averages, totals
Peak demand34.9GW · 14:25
Low 20.5 · 05:05Avg 28.40–40 GW
Made in Great Britain83%of demand
Generation 23.6Transfers 4.8 GW
Net imports112GWh
In
143 Out
31
Zero-carbon share49%of generation
Nuclear 15%Hydro 2%Wind 20%Solar 13%

Transfers · Mon 21 Sept

Interconnectors and storage

On Monday 21 September 2026, Great Britain imported 143 GWh and exported 31 GWh through its interconnectors. The most came from France (60 GWh), and the most exports went to Ireland (29 GWh).

All interconnectors

Mon 21 Sept
Imported
143GWh
Exported
31GWh
Net in
112GWh
Average net flow
4.67GW in

Into Great BritainOut of Great Britain

Belgium

Nemo Link

Average0.04GWExporting

In 1.0 GWhOut 1.9 GWh

Denmark

Viking Link

Average1.32GWImporting

In 31.6 GWhOut 0.0 GWh

France

IFA · IFA2 · ElecLink

Average2.50GWImporting

In 60.0 GWhOut 0.0 GWh

Ireland

Moyle · East–West · Greenlink

Average1.23GWExporting

In 0.0 GWhOut 29.5 GWh

Netherlands

BritNed

Average0.72GWImporting

In 17.3 GWhOut 0.0 GWh

Norway

North Sea Link

Average1.40GWImporting

In 33.6 GWhOut 0.0 GWh

Pumped storage

Dinorwig · Cruachan · Ffestiniog · Foyers

Average0.12GWGenerating

Generated 3.4 GWhPumped 0.6 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.