Rejected petition Hold a by-election whenever a sitting MP changes political party.

People vote for an MP because they believe in a particular political party or manifesto, if that MP then changes their party they should stand again in a by-election. This would ensure that the voters are represented by the party they want rather than by the whim of a particular MP.

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An MP voted in on a particular manifesto/political party who then goes on to change their allegiance to another party is no longer representative of the voters in their constituency.

This petition was rejected

Why was this petition rejected?

There’s already a petition about this issue. We cannot accept a new petition when we already have one about a very similar issue.

You are more likely to get action on this issue if you sign and share a single petition.

By-elections to be called automatically when MPs defect to another party
https://petition.parliament.uk/petitions/737660

We only reject petitions that don’t meet the petition standards.

Date submitted 4 January 2026
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