Expansys has the HTC One X listed in "polar white" or "glamour gray" for £499.99, while Amazon has the white version listed for £489.99. Amazon is also listing the HTC One S for £439.99. Meanwhile, Clove has the One S listed for £375.00, although the price goes up to £450 including VAT. (I assume that Amazon UK prices already include VAT, but someone feel free to correct me if I'm wrong.)
In any case, the April 5 UK release date matches what we've heard from various UK carriers, so I feel pretty confident in declaring this to be the official release date. Now, we just have to play the waiting game.
[Android Central]