Thanks for input guys, my gut feeling is leave well alone, I would rather spend less anyway, most I was going to offer them was circa £13k. Didnt think about the possibility of an import, good shout.
I've seen a private sale today, £10500 for one owner 05 plate, 60k miles, DSG, leather, looks good. Might look at this as I have just had a solid enquiry about the bmw this morning, making all the right noises about buying it, fingers crossed.