Hey Prowler
We work here but are not sure ourselves what the future plans are for the new centre and airport.
Rumour: the new centre will be built at the new airport.
Rumour: they are going to have to hire a load of TWR guys.
Unfortunately I can't give you a definate answer. Perhaps you should contact the Serco office. I believe they still have to negotiate with the local DCA as to how many they may hire.
It does seem we may be losing a few radar guys to "greener pastures" soon. So, who knows, they will probably be looking to hire again in the not too distant future.