If BAA drags this out then leave from STN.
Fewer airlines using STN will surely reduce the price of the sell-off.
I doubt anyone would knock STN long term future, it is the only London airport with capacity at the moment, roll forward ten years and if LGW wants a second runway after 2019 then once again, we could see a shift south of the river.
Anyhow, that is what competition is all about. Hopefully all Airport operators, airlines & employees & Joe public will benefit, once the economy starts to recover.
London plc will have competition from Europe to court as much traffic from the mega carriers from the west & east.