While the June heat was strongest in southern England and south Wales, few areas escaped the warmth.

Temperatures peaked at 37.7C in Lingwood, Norfolk , according to provisional figures. It was one of several stations to surpass the UK's previous June high of 35.6C, set in 1957 and tied in 1976.

"To see temperatures like this in the UK in June is sobering," said Belcher.

Not every weather station has data as far back as the famous summer of 1976, but even some of the longest-running stations saw their previous records broken by 2C or more.

"We normally expect the records broken by small amounts – tenths, maybe up to a degree or so," said Ed Hawkins, professor of climate science at the University of Reading.

"So to have it shattered by such a large amount is noticeable and extraordinary, and of course this comes after a similar event in May ."