I looked on the following web site and in the bottom left hand corner it says "Since 2003 manufacturers can no longer demand that you have your car serviced by an expensive franchised dealer. Thanks to changes in EU legislation, an independant garage can carry out the work without invalidating the manufacturers warranty. These changes could save you hundreds of pounds a year."
I was telling someone at work about it and they told me to check the small print from the dealer - in my case Vauxhall.
I cant find it on any documents, where am i likely to get this information because Vauxhall aren't going to tell me i dont need to go there to get my car serviced!
http://www.drive2000.com/ thanks