The Square Mile is a world of its own. London's meeting place of finance and tradition, it is a city within a city. A global centre of finance, the Square Mile is at a crossroads. As Britain is about to leave the EU, its status is uncertain. Will foreign finance companies still bring their business here?
Photographer Polly Braden and writer David Kynaston have collaborated on a book looking at the Square Mile at this pivotal point in its history. Take a look at some of the pictures: