I'm not sure what this will run but I can't recall any Raymond Weil "In House" quartz movements, I think this will be a standard ETA (probably a 955.XXX) module.
Any decent independent should be able to service this for £100 or so. Raymond Weil will charge you double that, and if you go through one of the high street places like Beaverbrooks it'll cost double again ("It has to go back to Switzerland you know?").
I really like Raymond Weil, I've had loads of then. It's a nice Swiss watch but a bog-standard movement so don't overpay, you can even buy a knackered but running one of these to steal the movement out of for £100-£150.
Just google local independent watchmakers. Failing that I'll have it done for you but there are most certainly closer places for you.
Kev