Met Office

The warning came with droughts already declared in Yorkshire and the north-west of England this year following what the Met Office says is the warmest and driest Spring in more than half a century.

For a heatwave to be declared by the Met Office we need to reach a threshold temperature for at least three consecutive days, and that varies from 25C across the north and west of the UK, to 28C in parts of eastern England.

The Met Office has revised an early weather warning for thunderstorms in Wales and parts of England on Saturday, reducing the affected area to parts of Scotland and Northern Ireland.

An amber weather warning for thunderstorms has been issued by the Met Office for parts of eastern and south-eastern England.

The Met Office said some places within the area covered by its amber warning could see 30-50mm of rain and winds in excess of 40-50mph.