The findings of an exclusive survey for the PA news agency come as the 25th anniversary of the Good Friday Agreement approaches.

The talks between unions and the Government broke down in June when a 5 per cent increase over two years was declined

Union Mandate is seeking a 7.7% pay increase, extra leave days, better discount and more full-time contracts

Workers unions and the Government had been negotiating a new public pay deal last month but discussions stalled after a 5 per cent increase over two years was turned down

The plan will be triggered if more than 20 per cent of airport security staff are out of work with covid-19.