I think this is the cheapest in stock at the moment.
In stock (Monday Feb 23) for £254.46 with free delivery
- to get it for under £250 use the 2% off code athttp://www.topcashback.co.uk/The_Link/vouchercode/2131-Offer
(haven't posted code as I'm not sure of Ts and Cs but it expires 28 Feb)
which brings the price down to £249.37
Topcashback and others give cashback too