[1][2][3] After the swearing-in of members and the election of Speaker, the State Opening of Parliament took place on 19 December.

[6][7] The 2023 State Opening of Parliament began the fourth session on 7 November 2023. Notable newcomers to enter the House of Commons in this general election included future cabinet ministers Claire Coutinho, Richard Holden and Laura Trott.

[8][9] The Parliament was marked by extraordinary political turmoil as the governments led by Boris Johnson, Liz Truss and Rishi Sunak had several high-profile political scandals and crises, which led to the Conservative Party seeing a major decrease in their popularity in opinion polling and the Labour Party and Liberal Democrats making gains from Conservatives, often by very wide margins.

This table relates to the composition of the House of Commons at the 2019 general election and its dissolution on 30 May 2024 and summarises the changes in party affiliation that took place during the 2019–2024 Parliament.

Mike Freer Paul Beresford Navendu Mishra Alex Cunningham Matt Vickers Jo Gideon Jonathan Gullis Jack Brereton Bill Cash Suzanne Webb Jim Shannon Nadhim Zahawi Bell Ribeiro-Addy Kate Green Siobhan Baillie Therese Coffey Julie Elliott Michael Gove Paul Scully Andrew Mitchell Carolyn Harris Geraint Davies Chris Pincher Esther McVey Rebecca Pow Lucy Allan Laurence Robertson Geoffrey Clifton-Brown Mark Pritchard Kevin Hollinrake Luke Hall Jackie Doyle-Price Neil Parish Thomas Tugendhat Rosena Allin-Khan Kevin Foster Nick Thomas-Symonds Geoffrey Cox Anthony Mangnall David Lammy Cherilyn Mackrory Greg Clark Munira Wilson Alan Campbell Carla Lockhart Boris Johnson James Davies Alun Cairns Florence Eshalomi Imran Ahmad Khan Angela Eagle Eddie Hughes Valerie Vaz Stella Creasy Ian Lavery David Johnston John Spellar Charlotte Nichols Andy Carter Matt Western Sharon Hodgson Dean Russell Peter Aldous Nus Ghani Mike Amesbury Peter Bone James Heappey Grant Shapps John Healey Andrew Bowie Nicola Richards Shaun Bailey Martin Docherty-Hughes Matt Hancock Órfhlaith Begley 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.