Hmm, I say that, then I came across this straightaway:
http://www.shopto.net/XBOX%20360/GAMES/XB2PR18-PES%202010%20%3A%20Pro%20Evolution%20Soccer.html
http://www.shopto.net/PS3/GAMES/PS3PR05-PES%202010%20%3A%20Pro%20Evolution%20Soccer.html
D'oh! :D
http://direct.tesco.com/search/default.aspx?search=Pro+Evolution+Soccer+2010&confirm.x=0&confirm.y=0
The cheapest price I've come across for pre-ordering this game on any site thus far. You also get Clubcard points if you're a membet at Tesco. :)