No brainer for you realky, BCS in Long Eaton(
I used them to refurb a few sets of wheels many years ago (Coupe and non-Coupe) and they lasted quite well. I think they used to be located closer to London when I used them, but they do collection anyway. They've been offering some discounted deals recently to previous customers so I'm sending off my wife's diamond cut VW Eos wheels next week (still pricey though even with the discount). Going to send them my Plus calipers soon also.