The fire at Bradford City football ground on 11th May 1985.
The cause of the fire is thought to have been the accidental dropping of a match or a cigarette stubbed out in a polystyrene cup and the resulting fire was fuelled by rubbish underneath the wooden stand.
The antiquated stand at Valley Parade eventually claimed the lives of 56 supporters and about 265 were injured. It was the worst fire disaster in the history of British football history.