Surely if Aviance pick up all the work they will need the extra staff? I imagine Servisair are running the station on minimum staff at the moment anyway so Aviance are hardly going to be overstaffed, especially with the summer season round the corner.
TUPE also protects the Servisair staff from being forced to accept lower wages and worse T&C's for doing their exisiting jobs for the new handling company. It's not their fault Servisair are pulling out of CWL! I bet if you were one of the Servisair staff you wouldn't think the law was an ass!!!