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A by election will be triggered if a sitting MP switches political party.

Submitted on Thursday 15th January 2026

Rejected on Tuesday 3rd February 2026

Current status: Rejected

Rejection code: duplicate (see below for details)

Petition Action

A by election will be triggered if a sitting MP switches political party.

Petition Details

If a sitting MP changes political party during the term of a parliament an
by election in that constituency is automatically triggered .

Additional Information

It seems indefensible for an MP to change political party and not allow the constituents to have the opportunity to endorse or otherwise that change.


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This petition was rejected

The Government e-Petitions Team gave the following reason:

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.

You may wish to sign the following petition, which calls for similar action:

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

Have your say on this petition!

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