just wanted to share my experience, maybe useful for someone.
I had my service 2 done, the 528 i bought some months ago had a dodgy service book i didn't trust.
I booked the car at an indy (custom werks in West Drayton close to Heathrow), i tried to book my car in about a month ago at Leighton Hall in Hemel Hempstead but the guy was a joke (after booking it in a week in advance he kept my car the whole day and did nothing to it, then we arranged to meet early next morning and he didn't show up!).
Anyway, Aman from custom werks is a top bloke! He did the service for £250, changed oil, oilfilter, airfilter, gearbox oil (previous owner/garagist put wrong oil in), pollenfilters, etc etc
He even installed my broken temp sensor.
The car is running incredibly well now and i feel a bit more assured, now i can put my foot down and really feel the engine!