PhilUFC
Humberside ATC staff are employed by Humberside Airport which is part of the Regional Airports division of MAplc, a division headed by East Midlands and also containing Bournemouth.
There will always be a few looking for pastures new, but Finningley (if it happens) would have to offer some good pay/conditions to make it worth leaving. Peel would presumably employ the staff themselves so pay may be on a par with Liverpool.
Make that visit, and get the info from the horses mouth.
PG