The Met Office has issued a yellow weather warning for thunderstorms covering 75 areas of England and Wales from midnight into Friday morning, with forecasters warning of lightning, torrential downpours and flooding.
The warning is in force until 10am across most affected areas, while a separate yellow thunderstorm warning covering large parts of Scotland remains in place until 11.59pm on Friday.
Forecasters say that although many places will escape the worst weather, those caught beneath thunderstorms could see travel disruption, power cuts, and flash flooding.