Some British Airways passengers are facing a third day of travel chaos at Heathrow as the airline continues to deal with the aftermath of a global IT crash.
British Airways says it's making good progress in fixing it's major IT systems failure but there has been a knock-on effect.
The problem grounded its planes on Saturday, affecting operations worldwide.
The airline says it operated a full schedule at Gatwick yesterday and is hoping to do the same today.
At Heathrow it expects to run virtually all scheduled long-haul flights, but it says the knock-on effects of Saturday's disruption could still mean some short haul flights are delayed or cancelled.
British Airways has apologised to customers and has urged those due to fly from Heathrow to check its website for updates.