Advice on good independent garage in Herts/Essex

[jward35]

Having had a 111 point check and finding a number of issues with my Cayman S that need sorting (both lower arm bushes, NSR outer drive shaft replacement etc.) I have decided to give up the Porsche extended warranty and go my own way. Decision helped by the fact that I recently fitted a new non-Porsche battery and the OPC were insisting on a Porsche battery at £380!
So that said, I am looking for advice on really good independent garages on the Herts/Essex border (I live in Bishop's Stortford). Any advice?

[jward35]

Thanks to everyone for the advice. Have sent an e-mail to PSR to see what they say and will do the same for the others as well.
Most appreciated.