Main roads in central London will be closed on Sunday as 25,000 runners take part in the 2012 British 10K.
The field will pass some of the city's best-known landmarks including Big Ben, the London Eye, Trafalgar Square, St Paul's Cathedral and Westminster Abbey.
Last year's winner, Kenyan Bernard Rotich, is hoping to improve on his time of 29 minutes two seconds.
The course record of 28:12 was set by Ethiopia's double Olympic gold medal winner Haile Gebrselassie in 2005."
