Having only ever been on one Serco contract, and only been in this part of the world for just on 6 years, I can say that I have noticed a serious decline in the morale of the Serco ATC'er staff.
Seems that Serco are just trying to get as much money out of all the contracts that they can at the risk of the staff and the contracts.
Sometimes I think that ever since they tried to get the NATS thing, it went seriously downhill from there and the other ATC contract(ors) -ATC'ers- are paying for it.
In most cases, I think that Serco is no longer offering competative salaries to the ATC'er staff and recruitment will just get more difficult or the quality will just gt less.
Used to be that they looked after the Customer, The Shareholder and the Employees.. Now they just look after themselves.