Morning, thank you both for replying.
I've actually purchased a 2001 1.4 petrol engined car - apologies, I should have been more clear in my original post. However, I assume the basics are similar, a 5 year period between changes?
The car has a quite fastidious service record with Audi, but I can only locate one invoice which relates to a timing belt change, that was 10 years ago in 2011. This may be partially explained by the car having a very low mileage, but of course, it's now well beyond the time period for a change.
Thank you.