PETITIONRejectedPetition · petition.parliament.uk
A by election will be triggered if a sitting MP switches political party.
If a sitting MP changes political party during the term of a parliament an by election in that constituency is automatically triggered .
Last fetched 03 May 2026 · petition.parliament.uk
Signatures
7
signatures
Government response threshold (10,000) · 7/10,000
Debate threshold (100,000) · 7/100,000
Background
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.