Today could be the hottest day of the year so far, the Met Office said. Over the weekend, parks and beaches filled as the temperature rose to highs of 24.5C, hotter than the Mediterranean.
Alex Burkill, a forecaster at the Met Office, said:
"There's a good chance we could reach 25C. There's an outside chance we could get a little above 25C, perhaps reaching 26C."
Mr Burkill said places most likely to see the hottest temperatures would be the London area, up to the Midlands, and up towards the north west.
More top news
New research has found #Brexit was the most commonly occurring hashtag for abusive tweets.
Leader Paul Nuttall said: "We cannot be cowed or allow our way of life to be undermined by those who wish to do us harm."
Ouarzazate in Moroco is all about the movies and half the city's residents work in showbusiness.