| Description | Final submission by Peter Heatfield, Area Secretary, to the Markham Colliery disaster public inquiry on 17 October 1973; a report by the mining engineer, A Bulmer, on the causes of the overwind which occurred at Markham Colliery on 30 July 1973; and a published copy of the public inquiry's report, produced by JW Calder, HM Chief Inspector of Mines and Quarries, which was presented to Parliament by the Secretary of State for Energy in April 1974. |