The contract was imposed as BASSA comedically buried it's head in the sand and was unrealistic. A modern union needs SOME degree of commercial reality and acumen just to go into negotiations knowing the lay of the land. Everything, every single last utterance that has come from planet BASSA / UNITE has been literally from LA LA land, the late 1970s and student politics of the loony left kind.
I seem to recall that the last airlines that granted a snap-back in pay as BASSA was demanding was....one Pan American World Airways. That's what BA is fast becoming.