Gatwick crew used to do a BFS and MXP but now the early BFS is done with a BFS crew. Not sure of the other bases.
The individual crew are still being moved round the network quite a bit, week in MXP/SXF/LYS/CDG/MAD etc.
As for Grenoble/Salzburg out of Bournemouth, good idea but very difficult to get slots on a Sat as its changeover day. e.g. when we started up INN, everyday except sat. (Until we bought the Gone Bust airline!!)
Hope that helps x