When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I got quoted £290 for 40,000mile service for my sti last week from Subaru.
40k service is just a minor service and doesn't include cam belt, well not on a newage anyway.
I think the op is looking at the £500 mark and maybe more at a main stealer.