Crookshank was elected Member of Parliament for Gainsborough in 1924, a seat he held for the next 32 years. He entered the government as Under-Secretary of State for the Home Department in 1934 under Ramsay MacDonald. When Stanley Baldwin became prime minister in 1935 Crookshank was appointed Secretary for Mines, a post he retained when Neville Chamberlain became prime minister in 1937 until February 1939. In the latter year, he was sworn of the Privy Council and made Financial Secretary to the Treasury. He continued in this post also when Winston Churchill came to power in 1940, and was then Postmaster General under Churchill between 1943 and 1945. In 1942 he was offered the post of British Minister Resident in the Mediterranean at Algiers following the liberation of Algeria by Operation Torch but he declined, Harold Macmillan being appointed instead. When the Conservatives returned to office under Churchill in 1951, Crookshank was appointed Minister of Health and Leader of the House of Commons, with a seat in the cabinet. In 1952 exchanged his post at the Ministry of Health for the sinecure post of Lord Privy Seal, while he remained as Commons Leader. He continued in these two positions until December 1955, the last year under the premiership of Sir Anthony Eden. In the 1955 New Year Honours he was made a Companion of Honour. He retired from the House of Commons in 1956 and was raised to the peerage as the Viscount Crookshank, of Gainsborough in the County of Lincoln, in January of that year. He had been offered a peerage in February 1940 but declined, having considered it at the time an insult because his First World War wounds had left him incapable of fathering any heir to a title. Papers released by The National Archives, London, November 2007, show that Crookshank, with Harold Macmillan, led a faction within the Cabinet of Sir Winston Churchill's government, who opposed what they perceived to be an attempt to bounce the Cabinet into a premature decision to authorise a British thermonuclear bomb programme in July 1954.
Personal life
Lord Crookshank was a Scottish RiteFreemason and Grand Master of Lincolnshire. Incapable as result of his First World War wounds of fathering children, Crookshank was a lifelong bachelor. He was also known as a homosexual and caused a near scandal when a male lover of his was adopted as Conservative candidate for the Grimsby constituency in 1958 but later withdrawn. His home from 1937 was at 51 Pont Street, Kensington, London, where in 1947 he hosted a meeting of like-minded backbench MPs who unsuccessfully demanded Churchill's removal as Conservative Party leader. He died of cancer at Chelsea, London, in October 1961, aged 68. The viscountcy died with him. Having been since 1960 High Steward of the City of Westminster, his funeral service took place at Westminster Abbey, followed by burial at Lincoln Cathedral. His sister, Helen Elizabeth Comfort Crookshank, lies next to him.
