Plymouth Sutton by-election, 1919
The seat had become vacant when the constituency's Conservative Member of Parliament (MP), Waldorf Astor, succeeded the peerage as the second Viscount Astor on the death of his father on 18 October 1919.
- The Conservative Party selected as its candidate Astor's wife Nancy, Lady Astor. She was also the candidate of the Coalition Government.
- The Asquithian Liberals stood Isaac Foot, who had served on Plymouth City Council and had previously contested Totnes and Bodmin.
- W. T. Gay stood for Labour, having done so in the 1918 election. Thomas William Mercer again served as his agent.
Lady Astor retained the seat. She became the first woman to take up her seat in the Commons (the first woman to be elected, Countess Markievicz, the Sinn Féin MP for Dublin St Patrick's, refused to take her seat).
|Coalition Conservative||Lady Astor||14,495|
|Labour||William Thomas Gay||9,292|
|Coalition Conservative hold||Swing|
|Coalition Conservative||Waldorf Astor||17,091||N/A|
|Labour||William Thomas Gay||5,334||N/A|
|Liberal||Capt. Sidney Ransom||3,488||N/A|
- Craig, F. W. S. (1983) . British parliamentary election results 1918-1949 (3rd ed.). Chichester: Parliamentary Research Services. ISBN 0-900178-06-X.
- Leigh Rayment's Historical List of MPs – Constituencies beginning with "P" (part 2)[self-published source][better source needed]
- Joyce Bellamy, "Mercer, Thomas William (1884-1947)", Dictionary of Labour Biography, vol.I, pp.238-239