On That Day: Hillsborough - A fateful day of change

There has been no more emotive event in British football history than the Hillsborough Disaster of April 15 1989. It was the spring afternoon when a simple game of football became a massed human tragedy. Having failed to learn the lessons of Burnden Park in 1946, Ibrox in 1971, the Bradford Fire of 1985 and, in the same year, the Heysel riot, it was the watershed moment that football had to change or face extinction.