Thanks very much for the info - certainly looks like the 5* is out of reach on the budget :(
Areas that I'd look at after some research include bloomsbury, mayfair, regents park, the city and westminster. I think I'll give the 5* a shot, in case of random luck! I have my re-bid areas worked out, so I'll give that a go up to limit and then work my way down to the 4*. I don't think there are any 4.5* in london, are there?
One more quick question - I assume that the priceline UK site will charge the associated credit card in GBP? Are there any credit card changes?
Thanks,
dj