Just saw this on PC World's website. Next cheapest (As far as I know) is Play.com at £24.99.
Now, the image/description doesn't state that it's the Game of the Year edition, which I believe has 4 extra maps. However I also believe that the GOTY edition actually replaced the standard one. So you may receive the GOTY edition, who knows :)
Edit: it seems that this isn't available online.
"Not available for delivery"