2021 Hartlepool by-election
6 May 2021
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Hartlepool constituency | |||||||||||||||||||||||||||||
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| Turnout | 42.7% ( 15.2 pp) | ||||||||||||||||||||||||||||
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A by-election for the United Kingdom parliamentary constituency of Hartlepool was held on 6 May 2021, triggered by the resignation of incumbent Labour Party Member of Parliament (MP) Mike Hill, who stood down over allegations of sexual harassment. It was won by Jill Mortimer of the Conservative Party with 51.9% of the vote and a swing of 16%—the largest ever swing towards a incumbent governing party in recorded UK by-electoral history.
This was the first by-election of the 2019–2024 parliament. The 21-month gap between the last by-election in Brecon and Radnorshire in August 2019 and the polling day of the by-election in Hartlepool was the longest since the Second World War; this was partially attributed to the COVID-19 pandemic.