The Samsung Omnia W offers pretty similar specs to the Nokia Lumia 800, but for a fraction of the price. You can currently grab the Samsung Omnia W - SIM free and unlocked – from The Order for £249.49.
In terms of specs, the Samsung Omnia W has a 3.7in Super AMOLED display, 1.4GHz processor, 5MP camera and Windows Phone 7.5 (Mango).
Delivery is an extra £6.50.
(Thanks to xxvv at HUKD)