The manufacturer's warranty on the Audi would be for 3 years so unless the seller is offering something, you won't be covered. Nice car though.
If you're open to other manufacturers, have a look on http://www.broker4cars.co.uk/. There are some amazing bargains to be had. A good spec Fabia will be cheaper than the Corse.
I've bought online before and I always recommend doing so.
I'm travelling back from Heathrow just now, but if you want to chat about this, PM me and I'll give you my mobile number.
Edit: there are other online brokers, but that's an easy site to give you an Idea of what's available.