Got the car back last night - the drive home seemd a bit smoother so time will tell

Also asked the dealer about proof of the work doing done (for later use ie. selling car etc), Dealer said that there was no paperwork due as it was free of charge by VW - Blah Blah Blah,

Anyway had a follow up call from David at VW UK today to see if all was okay - so I asked him can I get any proof of the work that has been carried out - David said get the dealer to supply a nil balance invoice as proof - any problems with getting this just call him back.