British Airways has warned it is facing a "serious" problem over wage costs which will "steeply increase" when the furlough scheme ends in September.
BA said it believed this would be a temporary problem, but it was a "serious one which we need to manage".
The warning comes alongside plans to set up a lower cost subsidiary airline at its Gatwick base.
BA halted its short-haul flights from the airport at the start of the coronavirus pandemic. It said the new subsidiary would run alongside its long-haul Gatwick routes.