The record temperature was taken in Charlwood, a village in Mole Valley, Surrey.
Meanwhile, the Met Office warned that temperatures could spike at 34C in London and the east of England later today.
Met Office forecaster Simon Partridge said: “It’s not entirely certain but there’s at least a 40% chance that we could see the hottest June day on record tomorrow.”
The hottest day on record was 35.6C in 1976.
Revellers at Glastonbury festival have been pictured enjoying the sunshine in Somerset – with some opting to walk around completely nude in the hot weather.
The Met Office has also issued a yellow weather warning for the North East of England and southeast Scotland this evening.
The alert runs from 6pm to midnight and includes lightning strikes and the risk of flash flooding.
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