GMB, the union for aviation workers, said it was a “sad and shameful” day for the company with BA workers left hurt, angry and demoralised by the airline’s behaviour.

Accusing the company of “bad faith”, the union said BA had used the threat of fire and rehire to transform the prospect of a decent deal with significant concessions – into a move that would result in “glorified zero hours” terms and conditions for staff.

Nadine Houghton, GMB National Officer said: “This doesn’t feel like significant progress to BA’s workforce. The bad faith shown by BA to mask a vicious attack on hard-won pay and conditions leaves a sour taste in the mouth.

‘GMB representatives worked tirelessly to negotiate a deal which would save jobs and mitigate against compulsory redundancies – including pay cuts, reductions in hours, and unpaid leave in the Winter.

“The prospect of a decent deal turned into a gun placed to members’ heads to force further concessions, with representatives pushed to accept additional pay cuts and a ‘lay off’ clause, which essentially creates glorified zero-hours contracts, on pain of dismissal and re-engagement notices being issued to BA’s loyal staff.

“Our members are hurt, angry and demoralised by this once-proud airline’s behaviour. This is a sad and shameful day in BA’s illustrious history.”