Vintage Omega Seamaster 166.010 service cost (UK)

I’m hoping someone would be able to give me a rough estimate on servicing costs for a vintage Omega Seamaster 166.010.

I’ve got my eye on one that looks in fantastic shape but requires a service due to low amplitude. It’s priced right from the research I’ve done but I’m keen to know how much the outlay will be to get it running as it should be.

I’d also be keen to hear of any well regarded London based (or entire UK) Omega specialists who can carry out the work.

Thanks in advance.