a stretch to far
GB are moving to Jubilee House on 1st March 737's are to be joined by Airbuses at Single Fleet Gatwick (SFG) as form March also so I doubt that GB will be taking over routes to run them on these aircraft otherwise why would they convert us.
Personally I can't see a private airline with a fleet of 15 Airbus aircraft taking over a BA base with far more (33) 737/400/500/300 and of course 777 boeings (around 15??)
Okay this is a rumour mill but lets not fantasise. If anything I would say some new routes some swaped routes or maybe they just want to welcome GB to a new place of working. If we get BAConed (a phrase that alwasy makes me hungry) I think certainly 1400 crew would leave in droves, there'e plenty of work out there at the moment.