More than 600 flights were delayed and dozens cancelled at London's Heathrow and Gatwick airports as thunderstorms disrupted air traffic across southeast England.

An amber warning for heat remains in place today until 9am tomorrow but temperatures are expected to drop, with a maximum of 33C expected in London.

Passengers are facing chaos at Heathrow and Gatwick today as hundreds of flights have been delayed or cancelled across both airports following thunderstorms