Thanks for that.  So if I contact a few VAG specialists  - TTS, VAG Tech, Indie Tech for a 50K service, VW will match their price,  so long as they use genuine parts?
According to the service book (1.1 Service Schedule) I have in front of me, the next service is an interval one and read that so far the spark plugs, air filter have not been changed. Is this correct? 
I am finding the service schedule a right pig to follow and understand.  Why can't they have a table with all the service parts and milage/time so you can see what needs to be done.