Just a note that if it comes to it beware of '75% for all' unless you have certain garauntees. At a our airline last winter following many lifestyle/workload complaints the training department were extremely excited to announce 'flexible' options of 50% or 75% options for Trainers... That would mean you could 'only' be rostered two or three weeks of the month as a trainer for the associated pay cut... When it was pointed out to them that was supposed to be the current balance of training/flying as per our current contract and that nobody would be dumb enough to sign up to that, the room fell awkwardly silent and it has never been heard of since. My only point is managent's interpretation of part time will not necessarily reflect what is fair, unless its carved in a contract made of stone, which considering BA's attitude, make sure they can't find the stone.