LONDON -- British champion rower Sir Steve Redgrave started the Olympic torch relay in London on Sunday, taking it out of Wembley stadium for the London leg of its journey to Beijing.

London Vice-Mayor Nicky Gavron (R) hands over the Beijing Olympic torch to quintuple Olympic gold medallist rower Steve Redgrave, who starts the Sundaly's relay in London, at Wembley Stadium, April 6, 2008. About 80 athletes and celebrities will carry the torch by foot, bike, boat and bus during the 31-mile relay. [Xinhua]

Eighty athletes, entertainers and dignitaries will relay the torch along a 31-mile route from Wembley Stadium to the O2 Arena in Greenwich.

Those taking part in the relay include 10 Olympic champions, among them are marathon world record holder Paula Radcliffe, 18 schoolchildren and public figures such as news reader Sir Trevor McDonald and musician Vanessa Mae.

Double Olympic champion Dame Kelly Holmes will run the last stage of the route to complete the relay before lighting the Olympic cauldron in front of 5,000 spectators.

On its journey through the city the torch will be carried on foot, on an open-topped double decker bus and by light railway past some of London's most iconic sights.

Despite bitter temperatures and sleet, impromptu carnivals are expected as the torch passes iconic landmarks such as Nelson's Column, St Paul's Cathedral and Tower Bridge.