In June 1917, Lord Devonport resigned as Food Controller to be replaced by Lord Rhondda, who introduced compulsory rationing of meat, sugar and butter in early 1918. By 1918, there were controls over almost all aspects of farming; the Food Controller bought all essential food supplies and the Corn Production Act guaranteed cereal prices. Lord Rhondda died on 1 July 1918 and was succeeded by John Clynes, MP. The armistice treaty ending World War I was signed on 11 November 1918. Following the war, the Food Controller resigned in 1919 and the Ministry of Food progressively wound down and closed on 31 March 1921.