Posting this up as a possibility - there's a slim chance you can get a 80GB PS3 for only £160.96 at your local Costco! TeamA'sinB on HUKD spotted this deal at his local store, Milton Keynes.
Some of the HUKD members reported a few in stock at various local stores - I recommend you give your local a call to check it out.
A few other members have managed to snag this deal too. Some people also report that upon telephoning the store, they are saying they do have stock available, but when they arrived to make the purchase, there were none left. So as they say on the internets, "your mileage may vary."
The deal only applies to Costco members of course, but as TeamA'sinB said, it;s not what you know, it's who you know! If any friends or family members have a Costco card, hopefully you can wrangle them into coming down to the store with you.
Note, this is the older "phat" 80GB model.
Good luck in the PS3 hunt!