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
2012 Grand National science and welfare said : "[The Grand National] has inherent risks, but, working closely with Aintree and other stakeholders, we do all we can to minimise these risks while maintaining the unique character of the race. The key data from these accidents will be collated... the BHA and Aintree review all incidents which occur during the Grand National meeting and consider what measures can be taken to address the risk of a repeat in the future. We consult and work with recognised welfare organisations such as the RSPCA, SSPCA and World Horse Welfare. It is our stated objective to continue