To me this looks like a reduction of international connector supply due to demand on the continent and French nuclear shutting down due to the heat. Maybe lower wind generation too?
Expect more of this as UK electrifies (and thereby increases demand) and misses (overoptimistic ) 'clean' energy targets.
Great Britain’s grid operator issues another warning over power supplies in heatwave | Extreme heat | The Guardian
https://www.theguardian.com/environment/2026/jul/09/great-britain-grid-operator-issues-another-warning-over-power-supplies-in-heatwave
'#EnergyTransition'
