This is a list of defections from the British Conservative Party to Reform UK, including former Cabinet members, sitting Shadow Cabinet members and backbenchers, and former Members of Parliament (MPs). As of January 2026, eleven former Conservative Party cabinet ministers have also defected to Reform UK.
All eight of Reform UK's MPs have been a Conservative Party member at some point.
The following are MPs who defected while sitting as an MP in the House of Commons.
The following are MPs who defected after their term as MP in the House of Commons ended.
The following are Peers who defected while sitting in the House of Lords.
The following are Member of the Scottish Parliament who have defected to Reform while sitting in the Parliament.
The following are Members of the Senedd, the Welsh Parliament, who have defected to Reform while sitting in the Parliament.
The following are members of the London Assembly who have defected from the Conservative Party.
The following are individuals who defected while serving as a Police and Crime Commissioner.
The following are individuals who defected while serving as City or County Councillors.