I would like to say that the day the UK, an island nation, gives away it's sovereign airspace will never happen... however given the fact that it is in the hands of lying, duplicitous politicians, I may well be wrong.
As an aside, at a recent Union conference it was stated by one person, rather high up, that the UK/Irish FAB was a waste of time... can't be bothered to hunt for the quote, but it is somewhere within the pages of
ATCOs.co.uk -