http://www.a4audi.co.uk/Great service, knowledgeable guys and they don't seem to dick about with charges if you get an error code up unlike AC etc.
I'd rather have my car worked on by people who give a toss, unlike the time and motion corner cutting monkeys and their stressed out managers in the big boys. I've got a few mates who work in a large franchised garage and the push for productivity and cost saving can have a serious impact on quality and safety of the work. But, that's just my thoughts.
Worth getting a quote from them or visiting for a chat, it's a very different experience from the big boys.