Killeen and Last aim to surprise in London

Great Britain enjoyed Olympic Games success on the road with Bradley Wiggins and on the track with Chris Hoy, Laura Trott, Vicky Pendleton and others, but the Olympics aren't over yet. This weekend is Team GB's final chance to score more Olympic hardware. Annie Last will race the women's cross country mountain bike race on Saturday while Liam Killeen will race the men's event on Sunday.