Olympic sports' sponsorship struggle

BBC sports editor David Bond looks at the sponsorship struggles many Olympic sports are experiencing a year on from London 2012.

Rowing gold medallist Helen Glover is without a personal sponsor and must be "realistic" about her future, while former deputy chairman of London 2012 Sir Keith Mills says as little as "5%" remains of the financial support which existed before the Games.

The Anniversary Games begin on Friday at the Olympic Stadium to mark a year from the start of London 2012.