Presented by Sue Barker ,
Steve Rider and Hazel Irvine.
4.00 Women's Marathon
Paula Radcliffe embarks on a gruelling 26-mile bid to claim her first Olympic title. Britain's leading hope for gold is unbeaten over the distance since her
2002 debut, and, with Sydney champion Naoko Takahashi omitted from Japan's team, Radcliffe is favourite to win.
Steve Cram and Brendan Foster commentate. DIGITAL AND INTERNET VIEWERS: additional coverage available via the red handset button or at www.bbc.co.uk/olympics