Three days of horseracing gets underway at Aintree, concluding in the John Smith’s Grand National on Saturday. Clare Balding introduces five races. The fearsome Grand National fences will be jumped in the John Smith’s Foxhunters Chase. With Rishi Persad, Norman Williamson, Richard Dunwoody, Richard Pitman and John Parrott. Commentary from Jim McGrath, Ian Bartlett, Tony O’Hehir and Darren Owen. Show less