I've just remembered - late last year (Nov IIRC) I Walked from Bishopsgate into Liverpool Street Stn through the adjacent arena type square (normally occupied by yuppies on lunch break or after work dinkies) and came across some sort of sleep in.
The square was full of sleeping bags and at one end an RAF field catering Sqn had set up a full mobile kitchen. I didn't get the chance to sample the grub, but the aroma was fantastic. The whole thing was in aid of a charity for the homeless.
It was great to see the, hard working, boys and girls doing their bit for the unlucky members of our society.
(Thread creep I know - but only a bit!)
Rgds SOS