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
Philippa has Wednesday's weather for the west
Philippa has Wednesday's weather for the east
A postmistress has been left traumatised after she was threatened in an armed robbery. The attack happened in Purley-on-Thames on Thursday.