I'm just waiting to hear back from the owner regarding the two references to "cam" in his receipts. From his receipt the line item read:
CAM unit price £191.40
And then he had a few other bits on there and then the final totals were:
Net 680.14
VAT 102.02
Total 782.16
Still looking at the total spent on servicing, parts etc since 2006 is £5,750 which sounds a lot to me, regardless of whether it's been serviced at VW dealers. In that space of time it's gone from 80,000 - 133,000 miles