BTSM,
guys with several thousand hours on 737s have already been offered jobs at LGW on the 737. No doubt low hours guys will be going there as well, but they will have some very experienced company.
What the experienced guys have to decide is whether they are prepared to sell up and move from their present location to do in most cases the same job on the same type but in a new uniform on very similar pay for several years. Many short haul guys applied to BA hoping for long haul jobs.