Forecasters have warned thunderstorms could cause flash flooding across parts of the UK this weekend. 

The Met Office has said there is the potential for between 20 and 30mm of rain to fall in the space of an hour. 

Grahame Madge, Met Office spokesperson, said: “We do have a very unsettled weekend in prospect, with a lot of it covered by a thunderstorm and rain warnings.

“We have got an area of low pressure which will be milling around over the UK bringing rain to quite large parts, so I think everywhere can expect to see quite heavy showers.”

He added: “We know the footprint of where we think the heaviest rainfall will be, but it’s like a boiling saucepan: you will get bubbles coming up, and trying to pinpoint where the next bubble will be is virtually impossible.”

Heavy rain may also accept areas outside of the Met Office warning zone, but this is less likely to cause flash floods.