Thanks for comments, I've had a look at the handbook and the belts should be changed every 120,000km or 75000 miles. I found out who had done the servicing for the old man who had it and they said everything was done at the correct intervals, my van is at 99000 so if I was a gambling man it should be good for a while yet! Hmm!! The garage knew both customer and van, the only thing I havent got is the service log which had a full set of stamps. Probably not worth the risk! Any thoughts anyone?