Annual fun run in aid of homelessness charity Crisis.
Starts and finishes at Paternoster Square (next to St Paul's Cathedral). The route is three and a half miles long.
After leaving Paternoster Square participants will run along the river walkways and past the Tower of London, City Hall and Tate Modern. Participants will also run over Tower Bridge and cross the finish line just north of the Millennium Bridge.
Runners finish the evening with a party at Paternoster Square.
Related website: www.crisis.org.uk/smr