Cambridge University by-election, 1940

The Cambridge University by-election, 1940 was a parliamentary by-election for the British House of Commons constituency of Cambridge University on 23 February 1940. Cambridge University was a two-member constituency.

The by-election was caused by the death of the sitting Conservative MP, Sir John James Withers on 29 December 1939 at the age of 76. He had been one of the MPs here since holding the seat in the Cambridge University by-election, 1926.

In the 1935 general election it elected two Conservative MPs. Cambridge University had been won by Conservatives at every election since 1922 when an Independent Liberal won one of the seats. The result at the last General election was as follows;

Due to the wartime electoral truce, the party who were defending the seat were assured of not facing an official candidate from the other political parties. However, the Conservative party, who were defending the seat, did not put forward an official candidate.

In 1939, before Withers had died, his health was not good and it was expected that a by-election would need to take place. The Master of Magdalene College, Allen Beville Ramsay had obtained agreement that none of the major parties would field a candidate if prominent economist, John Maynard Keynes chose to stand. Keynes was a Liberal party member and so unlikely to win the seat if a Conservative was standing. Keynes declined the invitation as he felt he would wield greater influence on events if he remained a free agent.

Eventually, Keynes brother in law, 54-year-old Prof. Archibald Hill became a candidate, standing as an Independent Conservative. He was professor of physiology at University College, London. In 1933, he became a founder member and vice-president of the Academic Assistance Council (which became the Society for the Protection of Science and Learning in 1936). By the start of the Second World War, the organisation had saved 900 academics from the Nazi persecution.

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