Used an excellent garage at the end of last year for repairing a leak on my Golf. After leaving the car with them they located the leak, which another supposed specialist had failed to do, and replaced all the parts with genuine items and all for a very reasonable price. Always kept me updated with progress of repair via e-mail.
As well as repair they have a very select range of vag stuff, all of good quality. I have had 2 cars from there and been brilliant. Use link below to move to servicing.
http://www.volkswizard.co.uk/