Hi Gareth,
There are a few 15 plates available on the Audi site. My budget would stretch to a newer face lift model. However this would mean getting one with 45,000 miles on the clock in 4 years. Because I do 17-20000 a year I feel I probably need a car that is well below average. Think it may be a bad idea to end up with a 5 year old car with 90,000 on the clock?!
cheers