I hadn't realised that Bell & Colvill had moved, they are now on an industrial estate in Guildford. They are, of course, also dealers in Lotus, Subaru and McLaren.
I've not heard of Ranmore, but I see they are between Dorking and Reigate, about 10 miles from the former B&C site in West Horsley. According to their website, Ranmore Fine Motor Cars is "a leading independent specialist in Rolls-Royce and Bentley cars".