Missed Warnings: The Bradford City Fire
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In May 1985, 56 football fans died after fire destroyed the main grandstand during a football match between Bradford City and Lincoln City.
BBC correspondent Robert Hall reported from Valley Parade that day and for the 30th anniversary he returns to speak to some of those, whose lives changed forever.
He also examines the circumstances which led to the disaster and why safety warnings appeared to be ignored.
This is a live stream of BBC Two starting at 23:20 BST
Available to UK users only