I've had both my SG and my Tele set up in R'n'B before and good jobs were done. Was reasonably priced too. I do know that Huw's bass was set up there, but the job done wasn't quite as good their work on my guitars.
Captain Toms have offered some kind of repair service in the past (basic setups, inputs,etc), not sure if they still do them. I think the prices were similar to R'n'B. Could be worth an ask
