Bert and I went for a walk the other night and visited BoxPark in Shoreditch. Its London's first pop up mall, with two floors. On the first floor are the shops which include, Nike, Levi's, Monkee Genes and much more.
On the second floor you'll find all of the food, Pieminister, Crussh and the Cyber Candy store to name just a few.
Check their website for daily details for any discounts or live music going on that day.