There's a guy called Meehow at No Regrets in Cheltenham that does brilliant B&G work.
Or Myth at Indigo Tattoo Northwich
David Corden @ Ritual Art Tattoo in Medway, Kent
Gary Weidenhof at Inkredible Kreations in Perth
Roy Priestley @ Skinshockz in Bradford
And remember even if artists are not based in the Uk they do come over for guest spots or conventions so keep your options open.
Pavel Angel and Victor Portugal would be awesome choices if you don't mind waiting til they appear in the UK or Europe