Yes they are going to need a lot of new staff for BE, chances are a lot may move over from Servisair who are already trained on the system.
Plenty of new staff have been taken on but the turnover rate is high, a few are finding that the grass isn't so green on the other side (at aviance) and have come back to Menzies.
Could be more big changes to come over winter with airlines moving around etc, just watch this space and see what happens.