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Daily UK grid report
UK Electricity Grid Daily Report — 27 July 2025

On 27 July 2025, Britain’s electricity grid averaged 25.76 GW of grid demand, with renewables averaging 44.0% of tracked domestic generation and carbon intensity averaging 110 gCO₂/kWh. Daily UK electricity demand, generation, carbon intensity, imports, exports and key records.

Avg demand 25.76 GW

Average grid demand for this UK day.

Peak demand 30.08 GW

Highest 15-minute grid demand period.

Avg carbon 110 gCO₂/kWh

Average carbon intensity where available.

Renewables 44.0 %

Average renewable share of tracked generation.

Average grid demandDemand
25.76 GWFull-day average from available snapshots
↓ −0.85 GW vs yesterday
Peak demand18:00
30.08 GWHighest 15-minute grid demand period
↓ −0.37 GW vs yesterday
Lowest demand05:30
20.05 GWLowest 15-minute grid demand period
↓ −1.19 GW vs yesterday
Domestic generationSupply
19.50 GWTracked UK generation sources only
↓ −0.72 GW vs yesterday
Average carbonCO₂
110 gCO₂/kWhCarbon intensity average
↓ −4 g vs yesterday
Renewable shareClean
44.0 %Wind, solar, hydro and biomass
↓ −0.3 pts vs yesterday
Clean share+ Nuclear
67.5 %Renewables plus nuclear
↓ −0.2 pts vs yesterday
Net importsFlow
5.10 GWAverage imports minus exports
↓ −0.09 GW vs yesterday

Daily insight

What happened on the UK electricity grid?

On 27 July 2025, Britain’s electricity grid averaged 25.76 GW of grid demand, with renewables averaging 44.0% of tracked domestic generation and carbon intensity averaging 110 gCO₂/kWh.

The highest demand period was 30.08 GW at 18:00, while the lowest carbon intensity period was 77 gCO₂/kWh at 14:00.

Key records for 27 July 2025

Highest wind6.16 GW14:00
Highest solar5.85 GW12:00
Highest gas9.90 GW19:00
Lowest carbon77 gCO₂/kWh14:00
Highest imports8.17 GW12:30
Highest exports2.55 GW22:15

Daily chart

Demand, generation and carbon intensity

27 July 2025

Generation mix

Wind, solar, gas and interconnector flow