 1940 Middleton and Prestwich by-election

The Middleton and Prestwich by-election, 1940 was held for the Middleton and Prestwich constituency on 22 May 1940, after the death of the sitting MP, Nairne Sandeman.The by-election was held during World War II, and five of the largest political parties – Conservative, Labour, Liberal, National Labour and National Liberal agreed to an electoral pact not to contest any by-elections in seats held by any of the other parties.