There had been a long history of labour unrest in the
British coal mining industry. A triple alliance had been formed in 1914 of the Miners Federation, the
Transport and General Workers Union and the
National Union of Railwaymen, for mutual support in trade disputes, but had been unable to undertake united action due to
World War I. In 1916, at the height of
World War I,
Lloyd George's government had taken control of the industry, but with
inflation the purchasing power of miners' wages had fallen. After the war government control was relaxed, and the triple alliance was revived. In 1919, as a conciliatory measure, the government appointed a
royal commission to investigate the industry under
Mr Justice Sankey, which recommended the nationalisation of mining royalties but did not explain how this would be achieved. The government, citing the lack of unanimity of the commission, declined to implement its report. The government responded to a strike by the Yorkshire miners in July 1919 by planning measures to maintain the mines during the strike. In April 1921 the miners went on strike, seeking equalisation of wages between coalfields, but the unity of the triple alliance collapsed, leaving the miners to fight on until hunger drove them back to work on Black Friday, leaving the employers (who had come together in the Mining Association) in control. There was a small concession to the miners of a temporary subsidy of £10M, but their average pay fell by 30% during 1921. ==Red Friday==