Cement mixers, Arctic lorries, Excavators.. all different kinds of equipment back there.
Photos: - Aircraft Pictures | Airliners.net
People talk about expanding into Hertfordshire but look at all that room that can be recovered from building a couple of multiple storey car parks out of the way.. Take the car parks behind harrods, car parks in the center of the picture and the engine bay & building site and there is **** loads of room. Just wasted, I know some of the greenery is landfill but the majority isn't.