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
The Times They Are a-Changin' (album) write a big song, with short concise verses that piled up on each other in a hypnotic way. The civil rights movement and the folk music movement were pretty close for a while and allied together at that time." The climactic lines of the final verse: ""The order is rapidly fadin'/ And the first one now/ Will later be last/ For the times they are a-changin'" have a Biblical ring, and several critics have connected them with lines in the Gospel of Mark, 10:31, ""But many that are first shall be last, and the last first." A self-conscious protest song,