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Open petition: Require a general election if an MP elected via a by-election becomes PM

Created by Gareth Payne
Closes on

An MP elected via a by-election can become Prime Minister through an internal party contest alone. We want legislation requiring a general election within 3 months of an MP ascending to the office of PM if they were elected to the Commons in a by-election.

We believe public trust in politicians is too low to assume electing an MP means accepting whoever their party later picks as leader — especially an MP not elected in a general election.

A by-election winner can become PM via internal party vote alone, with no national level public vote of any kind. We ask Parliament to pass legislation requiring a general election within 3 months if any MP is elected via a by-election and then becomes PM. This law would not affect MPs elected in General Elections who then become PM mid-term, nor party leadership rules themselves.

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  • Petition published

    This petition can now be signed.

    If this petition gets 10,000 signatures, government will respond to it.

    If this petition gets 100,000 signatures, it will be considered for debate in Parliament.

    This petition will stay open until 22 January 2027.