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Daily UK grid report
UK Electricity Grid Daily Report — 17 October 2025

On 17 October 2025, Britain’s electricity grid averaged 31.97 GW of grid demand, with renewables averaging 18.6% of tracked domestic generation and carbon intensity averaging 246 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 31.97 GW

Average grid demand for this UK day.

Peak demand 38.20 GW

Highest 15-minute grid demand period.

Avg carbon 246 gCO₂/kWh

Average carbon intensity where available.

Renewables 18.6 %

Average renewable share of tracked generation.

Average grid demandDemand
31.97 GWFull-day average from available snapshots
↓ −1.29 GW vs yesterday
Peak demand12:00
38.20 GWHighest 15-minute grid demand period
↓ −1.30 GW vs yesterday
Lowest demand04:30
24.04 GWLowest 15-minute grid demand period
↓ −0.83 GW vs yesterday
Domestic generationSupply
27.06 GWTracked UK generation sources only
↓ −1.16 GW vs yesterday
Average carbonCO₂
246 gCO₂/kWhCarbon intensity average
↑ +13 g vs yesterday
Renewable shareClean
18.6 %Wind, solar, hydro and biomass
↓ −5.1 pts vs yesterday
Clean share+ Nuclear
33.3 %Renewables plus nuclear
↓ −4.1 pts vs yesterday
Net importsFlow
3.66 GWAverage imports minus exports
↑ +0.08 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 17 October 2025, Britain’s electricity grid averaged 31.97 GW of grid demand, with renewables averaging 18.6% of tracked domestic generation and carbon intensity averaging 246 gCO₂/kWh.

The highest demand period was 38.20 GW at 12:00, while the lowest carbon intensity period was 207 gCO₂/kWh at 23:30.

Key records for 17 October 2025

Highest wind2.87 GW23:30
Highest solar3.20 GW12:30
Highest gas20.53 GW18:00
Lowest carbon207 gCO₂/kWh23:30
Highest imports7.35 GW14:00
Highest exports2.83 GW07:00

Daily chart

Demand, generation and carbon intensity

17 October 2025

Generation mix

Wind, solar, gas and interconnector flow