Talks held yesterday between arbitrator ACAS, British Airways and the union representing its cabin crew have failed to yield an agreement between the two sides.
"ACAS tabled a potential way forward last week to BA and Unite with the aim of trying to break the deadlock in this long-running dispute," says ACAS.
"Having given the parties time to reflect upon this initiative, ACAS met separately with the parties yesterday. Regrettably, the parties were unable to move closer to an agreement. At present there are no further meetings planned but ACAS will monitor developments and our services remain available."
A Unite spokesman says: "Unite remains committed to finding a settlement which addresses our members' concerns and we remain in contact with BA and ACAS." He declines to provide any details about the proposal or why it failed.
A BA spokeswoman says the carrier "remains available for talks".