there's 2 that i would recommend:
Ripley, Derby - GM Clements 01773 744434, speak to matt, they've done a lot of work on cars that get features in mags and matt has a polog40 and golf g60 so knows his dubs... just done my mates ibiza bumper.
Stapleford, Nottingham - VW specialist 0115 9393937 (don't know the name of the place), my car has just come back from here today after having dent/ scratches/ smoothing done and adi is a sound guy, has a smart corrado g60 too!
they should sort ou out!
scott