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
Becher's Brook Becher's Brook during the main Grand National race (excluding the other races held on the course during the three-day meeting), including those who unseated their riders or were brought down, but not including those that pulled up, were carried out, or refused at the fence. Becher's Brook Becher's Brook ( ) is a fence jumped during the Grand National, a National Hunt horse race held annually at Aintree Racecourse near Liverpool, England. It is jumped twice during the race, as the sixth and 22nd fence, as well as on four other occasions during the year. It has always been a