Temperatures will climb to a record-breaking 38C next week as a 'heat dome' is set to hit Britain, with the Met Office issuing a new four-day warning for extreme weather.

Record highs of 38C have been forecast for Wednesday and Thursday by the national weather service – breaking June's highest-ever recorded temperature of a blistering 35.6C in Southampton in 1976 and Camden Square in 1957.

In London, temperatures will rise to a scorching 38C across the two days, while Birmingham will see similar highs of 35C on Wednesday and 37C on Thursday.

Amber extreme heat warnings have been extended by the Met Office from Monday and Tuesday to include Wednesday and Thursday, covering much of southern England and Wales, the East and West Midlands, the South West and South East England, as well as the East of England.

The heat is expected to remain sweltering throughout next week as tropical nights have been predicted in areas where temperatures remain above 20C.