a by-election. The election was won by Jill Mortimer of the Conservative Party. It is the first time the Conservatives have held the seat. Members of Parliament Elections Elections in the 2020s The result was the biggest swing towards an incumbent governing party in a by-election in the post war era; the record was formerly the 1945 Bournemouth by-election. Elections in the 2010s Elections in the 2000s Elections in the 1990s Elections in the 1980s Elections in the 1970s See also List of parliamentary constituencies in Cleveland History of parliamentary constituencies and boundaries in Cleveland History of parliamentary constituencies and boundaries in Durham Notes References Specific General Craig, F. W. S. (1983). British parliamentary election results 1918–1949 (3 ed.). Chichester: Parliamentary Research Services. . Politics of the Borough of Hartlepool Parliamentary constituencies in North East England Parliamentary constituencies in County Durham Constituencies of the Parliament of the United Kingdom established in 1974