eee really expensive in central london, so maybe invest in bunk buds and practice your sardine impressions?
you'd proably find it easier to look for a place a bit of a tube jaunt from the center, and cheaper. there's bound to be places doing rooms and student lets, orrr poss rent a house altogether if you can find somewhere willing to let a group of students (perhapss) without jobs rent their place.
is student accom not an option?