Not a recommendation for mechanical work, but I had accident damage repaired at Jones and Bramley, and they did an excellent job. The new bonnet fits better than the original one did!
They seem to do work for all the major insurance companies. They were also very helpful in sorting out my door water leak, which wasn't even their fault originally. See
here (147 water in door pocket).
Jones & Bramley Coachworks Ltd
Factory Road
Newport
South Wales
NP20 5FA
01633 259367