Square Mile went down to the Crisis Square Mile Run to get in on the action.
The six kilometre route takes in some of London's most iconic landmarks and Crisis aims to raise £160,000 from the event to help single homeless people across the UK improve their lives. Each runner was asked to raise a minimum of £200.
All funds will go towards the charity's work helping homeless and vulnerably housed people in London and throughout the UK. Almost 4,000 people slept rough at some point in the capital during 2010/11, a number which is still rising.