Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Middlesbrough West by-election, 1940 was a parliamentary by-election held on 7 August 1940 for the British House of Commons constituency of Middlesbrough West. The seat had become vacant when the constituency's Liberal Member of Parliament (MP), Frank Kingsley Griffith (23 December 1889 25 September 1962) vacated his seat on becoming a County Court Judge. Griffith was first elected as the constituency's MP at the Middlesbrough West by-election, 1928, caused by the death of the previous Liberal MP Walter Trevelyan Thomson. Griffith had previously contested Bromley in 1922, 1923 and 1924.