British Airways passengers are facing a third day of disruption at Heathrow as the beleaguered airline continues to deal with the fallout from a global IT crash.
Both Heathrow and Gatwick have warned Bank Holiday travellers that they should check the status of their flights before travelling to the airports where scenes of chaos unfolded over the weekend.
BA has said it will run a full schedule at Gatwick on Monday and it intends to operate a full long-haul schedule and a "high proportion" of its short-haul programme at Heathrow.
The airline said it was continuing to make "good progress" in recovering from the worldwide IT glitch that grounded scores of planes, leaving thousands of passengers stranded.
An airline spokeswoman said: "We have operated a full schedule at Gatwick today on Sunday. At Heathrow, we have operated virtually all our scheduled long-haul flights, though the knock-on effects of Saturday's disruption resulted in a reduced short-haul programme.
"As our IT systems move closer to full operational capacity, we will again run a full schedule at Gatwick on Monday and intend to operate a full long-haul schedule and a high proportion of our short-haul programme at Heathrow.
"We apologise again to customers for the frustration and inconvenience they are experiencing and thank them for their continued patience.
"We continue to urge customers due to fly from Heathrow tomorrow to check on ba.com that they have a confirmed booking and that their flight is operating before setting off for the airport. Customers looking to re-book flights should go to ba.com."