It's going to be absolutely roasting for the next few days to get the average up. Met Office issues April heatwave verdict with UK to predicted to 'bake' 14:43, 3 APR 2024 Brits are in for a sweltering spring, seeing heat to rival that of 2022's in April, while the Met Office has already projected overall temperatures this year to smash records again. https://www.aberdeenlive.news/news/uk-world-news/met-office-issues-april-heatwave-9203629
Domestic use accounts for around 35% of UK energy production. These things also use a lot of other land for the cables, substations and sundry infrastructure.