The 1920 Abertillery by-election was held on 21 December 1920. The by-election was held due to the resignation of the incumbent Labour MP, William Brace. It was won by the Labour candidate George Barker.[1]
^Craig, F. W. S. (1969). British parliamentary election results 1918-1949 (1 ed.). Glasgow: Political Reference Publications. ISBN0-900178-019. Page 564