Hi JP
I booked my 2011 GTS in with Paul at Graypaul's Nottingham for its first service in March 13.
I originally when on "www.servicethecar.com" (Sponser on this site) to get quotes and they gave me the two year service at the 12500 mile price ie £862.50 inc VAT (List Price £1318) , free geometery check and loan car.
Hope this is of assistance.
Chris