Just for info, I rang my local VW dealer today to price up a 4 yr service which is due anytime soon. My car only has 25k on so will hit 4yrs first. They told me as part of the fixed price servicing a major service was £259. Timing belt and tensioner would take it to £339 and worst case with water pump (which they said they would inspect and only change if necessary) would take it to £419.