This afternoon is the annual Grand National at Aintree, where by 40 horses line up to battle each other around the 4.5 miles (7,200 metres) race course. The race comprises of two full circuits of the 2.25 mile (3,600 metres) Grand National course, which is flat throughout.
There are 30 testing fences that the riders have to contend with and two special jumps. Each of the 16 fences on the course are jumped twice, with the exception of The Chair and the Water Jump, which are jumped on the first circuit only. The Grand National was first run in 1839 but only 11 favourites have ever won the race.