I currently have my car (1996 Continental R) in for brake and suspension overhaul at RR&B Garages in Bromsgrove, Worcestershire, UK - this is the first time I have used them, but the overall impression is this is an extremely professional outfit, very pleasant to deal with and competitively priced when compared to other established RR and Bentley specialists. They are also very interested in complete transparency as to costs producing very thorough quotations before work commences, broken down with individual labour and parts costs for each element of the work so if you are on a budget, you can pick off more pressing elements and do them, and stem the cost. They properly understand these cars, and are only interested in doing a proper job - the brakes are complete and I went and looked at the car on the ramp, and very impressed with the quality of work and attention to detail.
They also do some very serious restorations of older cars and had a Phantom V in the workshop when I was there, previously owned by, I believe, someone ultra-famous, having a complete restoration. Also there was a Bentley S2 Continental 2dr on one of the ramps, which was nice to see as my father had an almost identical one in the 70's.