British Airways has cancelled all flights from Gatwick and Heathrow as computer problems cause disruption worldwide.
Passengers have been told not to travel to the London airports because of "extreme congestion" at the terminals, with all BA planes grounded before 6pm on Saturday.
We have experienced a major IT system failure that is causing very severe disruption to our flight operations worldwide.
More top news
Brighton face a tough test on Sunday afternoon as they host Manchester United at the Amex Stadium.
The latest weather for the east with Philippa
The latest weather for the west with Philippa