I had mine done the other week, cost me ?112. As blue says it's about ?60 labour plus parts and vat. As a bit of advice, make sure you get the timing belt tensioner done at the same time and it will save you some cash in the long run and get genuine VAG parts too. Mines a mk1 but the prices for mine were ?11 for belt, ?25 for timing belt tensioner (both VAG), ?60 labour and then VAT on top. It's certainly a job that should never be put off until later !