This is the lowest price on the market by a good couple quid (the closest prices which are from Play and Amazon generally take about a week to arrive though, whereas this is next day) but on top of that, Shopto are offering a free Sackboy Figurine while stocks last.
LittleBigPlanet is regarded as one of the best games on the PS3, receiving rave reviews from everywhere including 95% from the highly reputable IGN stating:
"Media Molecule has created a brilliant platformer, and then given you the tools to recreate the whole thing over again, or better yet, to create your own ideas from scratch. It's not perfect - the controls could be tighter, automatically shifting between planes can be problematic, the editor isn't quite as robust as you might hope - but what's there is nothing short of astounding."
Don't forget to go through Quidco to receive 4% cashback, making this a very attractive £26.87 including free first class recorded delivery.
Hope that helps. :)