So the dealer have agreed to replace the front tyres and the rear brake pads and they were apologetic regarding these items which apparently should have been done before my boy collected the car. However, they are not happy about replacing the shocks and want to inspect the car again, stating light oil misting is perfectly acceptable. I've examined the car more thoroughly and the front off side shock is leaking so much, it's reached the lower spring perch. If they don't replace now, according to the small print of the approved used warranty, any existing faults are not covered. As they have been pointed out at last two mot's I doubt vw would honour a claim.
Update to follow.