Two young boys concentrate on piling plastic bottle crates on top of each other making towers that echo the tall Canary Wharf tower structure a mile away in the background at Dockland's area of East London. On the grassy bank at Mudchute, a city farm on London's Isle of Dogs, the pile of crates is untidy and unstable making them lean at odd angles making the boys hold on to their building projects. They are dressed for a summer afternoon's activity in a seemingly rural location but which is, in fact, an area of inner-city London.