2013 Grand National to modifications made for the previous year's race, Aintree announced that a number of further changes had been made for the 2013 National. Twelve of the 16 fences on the course were rebuilt with the timber frames within them replaced by a softer material known as "plastic birch". The fences are still covered with at least 14 inches of spruce and will remain the same height. The starting line was also moved 90 yards closer to the first fence, further away from the spectators' stands and thereby reducing slightly the overall distance. Aintree and the Professional Jockeys' Association jointly issued
Grand National lease in 1848. One century later, the Topham family bought the course outright. Later in the century the race was the setting of a thriller by the popular novelist Henry Hawley Smart. For three years during the First World War, while Aintree Racecourse was taken over by the War Office, an alternative race was run at Gatwick Racecourse, a disused course on land now occupied by Gatwick Airport. The first of these races, in 1916, was called the Racecourse Association Steeplechase, and in 1917 and 1918 the race was called the War National Steeplechase. The races at Gatwick are not