Where thundery showers do fall, they will bring frequent lightning, gusty winds and potentially some large hail, as well as brief spells of heavy rain, the forecaster said. It has warned that 15-25 mm of rain fall may fall in an hour, with a very small chance of 30-40 mm falling in three hours.

The Met Office has issued two yellow weather warnings for thunderstorms in Oxfordshire. The first warning is in place later today from 12 noon until 8pm (September 20) and the second is in place from 1am until midnight on Saturday (September 21).

The Met Office has issued yellow warnings for thunderstorms for several areas across the country. The first alert is to be enforced between 12pm and 8pm on Friday, September 20 and covers the southwest of England,