Wow - thanks for the welcome and all the posts.
I remember seeing the star shape on the wheel bolts so I gather it could be plastic covers. If so, they can only be pence to fix, it's just that I had never seen white on the bolts like that before.
All your posts are quite reassuring. I think I'll be very lucky to find a used car in brand new condition. I do have a contact for smart repairs if I bought as is, though I haven't tried him yet, but it is always a negotiating point. The interior of this one did seem tidy. Mechanically I didn't drive the car hard, but didn't find anything amiss. There's a dash-top rattle, but I saw the post about how to sort that.
The car is two years old and advertised at £16k with 25k on the clock. Spec-wise it's the closest so far to ideal, which explains why it's at the price of some 07 regs or even near the bottom end of ED30s. It is isn't seriously over the odds either, so if I leave it too long it could always go. I've never actually bought from a used car dealer before, having only ever bought privately or via family. I normally search only eBay, the classifieds on here or the private ads of AutoTrader or Pistonheads. I expanded the search to dealers, saw it was only a few miles down the road and so worth having a look.
The chips can be touched in, wheels refurbed in a couple of years when they need it. I think what bothers me the most is the noticeable scratch along the side and that if it could be polished out, it hasn't been done yet. I think it's worth a call to check it hasn't sold already and see if they can actually try polishing out the scratch. I'd be willing to take some ScratchX down there myself and have a go.

Dan - I had come across yours on my searches (and I'll be passing by on the A11 this weekend). I'm really after a five door though.