Clare Balding is at Hickstead for one of the highlights of the show jumping year, the DFS Derby. A test of skill and courage, the course features the famously steep Derby Bank which has proved a challenge to the world's best riders and horses, including Britain's William Funnell who is back to defend his title after a fine win in 2006 on Cortaflex Mondriaan. Commentary from Michael Tucker and Stephen Hadley.