The St Pancras West by-election of 1916 was held on 16 October 1916. The by-election was held due to the resignation of the incumbent Conservative MP, Felix Cassel to become Judge Advocate General of the Armed Forces. It was won by the Conservative candidate Richard Whieldon Barnett, who was unopposed due to the War-time electoral pact.
References
St Pancras West by-election, 1916 Wikipedia(Text) CC BY-SA