former high court judge led the inquiry into the bradford stadium fire which killed 56 football fans .
official inquiry into the blaze , led by mr justice oliver popplewell , concluded that fire was an accident , probably caused by a spectator dropping a cigarette into rubbish that had no insurance value .
he also added that the fire was examined by experienced and thorough investigators , who found nothing suspicious and that no question of arson was ever raised in civil legal proceedings .