John,
Oakmere is my "local" service centre, albeit 40-odd miles away. JCT600 in Bradford is the next nearest. My Elise has been to a dealer service once in all the time I've owned it, from new. It gets serviced by an independent in Accrington and I suspect my Emira will, too! I'm not sure what the warranty conditions state though ...
Would that be Phoenix Motorsport in Accrington?
That's where I take my VX220.