fifty-six people were killed and 265 were injured on may 11 , 1985 , when the bradford city fire disaster occurred at valley parade .
martin fletcher 's mother , susan , told her son about the disaster on may 11 , 1994 , that killed her other son , husband , brother-in-law and father-in-law .
then-bradford chairman stafford heginbotham was linked to at least eight other fires before the disaster at valley parade .
fletcher is releasing his book , ` fifty-six - the story of the bradford fire '