Balderstons Peterborough BMW dealer, excellent service today and fitted a new Trailwing for the rear on my GSA for £146, now I know you can get it slightly cheaper but the coffee, biscuits and service are first class from their new shop. Check out their website.
The other place is Cambridge Tyre who quoted £120 but the last time I used them it took over 2 hours to finish the job as they were trying to do several jobs at once.
Def go for Balderstons. Brian.