Apart from eggs with sausages or bacon until 11am at weekends, this chic shack serves nothing but burgers (including a vegetarian version), fries and milkshakes. And what burgers: thick, juicy and wonderfully messy, with mustard, gherkin and cheese. The shack is located in the backyard behind Pizza East restaurant. There isn't much dining space, so take away to Hampstead Heath instead.
Dirty Burger has an ever-expanding empire around London, with 11 branches dotted around.