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
1998 Grand National backed down to joint-favourite until shortly before the start, before being sent off at 8/1. The partnership was a distant last of seven runners still standing four fences from home when he refused. Samlee was a nine-year-old who came to prominence after winning the Becher Chase over one circuit of the Aintree Grand National course in November, having been second in the Scottish Grand National earlier in the year. Another victory in a modest 3 mile 6 furlong chase at Sandown followed in December before finishing third to Earth Summit in the Welsh National and third again in the Eider