Thanks chaps, ill be buying private i expect so i doubt ill get any warranty, which hopefully wont bite me in the ass.

i do around 6-7k miles a year, its 10 miles each way to work along B roads and 1 mile of duel carriageway. the A3 TDI quattro i have at the mo will do 40mpg with its arse handed to it quite often. i could live with low 30's i expect - ill just have to leave earlier lol