There have been lots of ideas about how to use empty stores but few are as imaginative as this one.  Take an empty store in Hackney and use it as a farm to grow food. Chickens on the roof, mushrooms in the basement and fish farm on the ground floor. Even an indoor allotment!
http://www.springwise.com/retail/london-retail-space-world%E2%80%99s-farm-shop/