My understanding is, for what it's worth, that Manning have established that they will be short of trained aircrew in the medium term once airlines start recruiting non-type rated pilots, so there is not much likelyhood of any widespread redundancies. There may well be some targeted at particular individuals, presumeably the older generation with little time to serve?
The trick will be finding something worthwhile for people to do in the interval. At Wiltshire's secret airbase we're reducing crews but looking to retain everyone for the future, so lots of OOA & COS jobs to be filled?