The Met Office says London Heathrow reported a temperature of 40.2C at 12:50 today, APA reports citing BBC.
It's a provisional record, it says, and temperatures are still climbing.
Just over an hour ago, a new provisional record of 39.1C was recorded at Charlwood in Surrey.
Until today, the record temperature for the UK was 38.7C, set in Cambridge in 2019.