Bikeworks do fantastic work training up the local community - including ex prisoners - to become skilled bike mechanics. They also recycle and sell on found bikes.
http://www.bikeworks.org.uk/
Jim gave us some really valuable advice about the best way to develop our mobile food vehicles. We started off with an idea that a sort of towed cart / trolley would be best - which could be clipped on to any bike. But Jim was concerned about the damage that this would do to the rear parts of people's bikes and how robust the towed cart would be. Also would it tip over?
We had fun testing out one of the cargo bikes he had there. They're not too heavy and pretty easy to ride (as Peter is demonstrating!)