ChoicesUK are selling "Unreal Tournament 3" for the PC for £12.99 inc Del.
+ 5% cashback through TopCashBack (Quidco don't seem to have ChoicesUK listed)
This is £5 cheaper than the next cheapest price which seems to be Amazon.
"Unreal Tournament 2007 is the sequel to Unreal Tournament 2004. It is powered by Epic's new Unreal Engine 3 and promises a return to the "feel" of the original Unreal Tournament. While UT2004's double-jumping and dodge-jumping will remain, the game is more fast-paced. However, old favourites from the original UT such as jump boots and the ability to feign death will return in UT2007. As before players can choose from a number af teams: Nakhti (Egyptians from UC2), Necris, Juggernauts, The Corrupt, Iron Guard, Krall, Jacob's Team or "Player's Team" (Unnamed)."