Central and eastern areas forecast to be hottest as conditions nudge towards heatwave threshold
Temperatures exceeded 30C (86F) in some southern parts of the UK on Tuesday, before thunderstorms were expected to descend on the south-west.
The mercury hit 30.7C in Gogerddan, Wales, the highest temperature recorded on Tuesday – and the highest temperature since July – as a southerly airflow brought very warm conditions across England and Wales.