A weather warning has been issued as thunderstorms are set to hit London and Essex tomorrow evening.

The Met Office has issued a yellow warning for heavy downpours and lightning from 7pm on Friday until 12pm on Saturday.

Tomorrow evening another hot and increasingly humid airmass is expected to spread into the south of England from the continent.

The Met Office said “storms could be severe, with torrential downpours and large hail, with 30 mm of rain possible in less than an hour.”

This follows yesterday's record mid-30 degree celsius temperatures for July.