[4] The Conservative Party under Prime Minister Rishi Sunak lost over 240 seats and its 14-year long tenure in government.

The Labour Party formed a majority government under the leadership of Keir Starmer, winning over 400 seats.

This table relates to the composition of the House of Commons after the 2024 United Kingdom general election and summarises the changes in party affiliation that took place during the 2024–present Parliament.

For full details of changes during the 2024–present Parliament, see By-elections and Defections, suspensions and resignations.

The label under which MPs sit in the House of Commons can change if they leave or are suspended from or expelled by their party.