Campaigners for an inquiry into the so-called 'Battle of Orgreave' have vowed to continue their fight.
Members of the Orgreave Truth and Justice Campaign told a news conference "we regard the gloves as off" in response to Home Secretary Amber Rudd's decision not to look further into violent clashes between miners and police in 1984.
Labour MP Andy Burnham will ask an urgent question in the House of Commons about the government's decision not to hold an inquiry into the events at Orgreave in 1984.
The question is expected at 12.30pm.
Mr Burnham posted a message on Twitter saying he believed Ms Rudd would not be in the Commons to answer his question.
Campaigners are angry that their call for an official inquiry into clashes between police and miners during a bitter industrial dispute were rejected by Home Secretary Amber Rudd.
Ms Rudd said she made the "difficult decision", supported by Prime Minister Theresa May, because "ultimately there were no deaths or wrongful convictions" resulting from the conduct of South Yorkshire Police.
The Orgreave Truth and Justice Campaign and the National Union of Mineworkers are said to be taking legal advice following Ms Rudd's decision.
Campaigners said "we regard the gloves as off" as they responded to the Home Secretary's decision not to hold an investigation.
In scenes reminiscent of the English Civil War, the Battle of Orgreave split the United Kingdom and changed industrial relations for ever.
The Government has chosen not to hold an inquiry into the conduct of South Yorkshire Police during the so-called Battle at Orgreave.