@ LadyAtco
All transfers have involved the majority of ATCOs transferring.
Not correct - only one stayed at Liverpool in 1982 and none stayed at Prestwick in 1993. I don't think many, if any at all, stayed at Hurn either.
Of course, times have changed and your premise regarding vacancies etc. may be correct but with little slack in unit complements nowadays, it only needs a handful to go to cause big problems. SRATCOH has seen to that ......