| Constituency | Affiliation of incumbent | Member returned | Notes |
| | Affiliate |
| Aberavon | | Labour | Stephen Kinnock | | Labour | Seat held |
| Aberconwy | | Conservative | Robin Millar | | Conservative | Incumbent, Guto Bebb, did not stand |
| Aberdeen North | | Scottish National | Kirsty Blackman | | Scottish National | Seat held |
| Aberdeen South | | Conservative | Stephen Flynn | | Scottish National | Incumbent, Ross Thomson, did not stand |
| Airdrie and Shotts | | Scottish National | Neil Gray | | Scottish National | Seat held |
| Aldershot | | Conservative | Leo Docherty | | Conservative | Seat held |
| Aldridge-Brownhills | | Conservative | Wendy Morton | | Conservative | Seat held |
| Altrincham and Sale West | | Conservative | Graham Brady | | Conservative | Seat held |
| Alyn and Deeside | | Labour | Mark Tami | | Labour | Seat held |
| Amber Valley | | Conservative | Nigel Mills | | Conservative | Seat held |
| Angus | | Conservative | Dave Doogan | | Scottish National | Defeated incumbent, Kirstene Hair |
| Arfon | | Plaid Cymru | Hywel Williams | | Plaid Cymru | Seat held |
| Argyll and Bute | | Scottish National | Brendan O'Hara | | Scottish National | Seat held |
| Arundel and South Downs | | Conservative | Andrew Griffith | | Conservative | Incumbent, Nick Herbert, did not stand |
| Ashfield | | Labour | Lee Anderson | | Conservative | Incumbent, Gloria de Piero, did not stand. Elected as Conservative MP, whip suspended in 2024. Defected to Reform UK on 11 March 2024. |
| Ashford | | Conservative | Damian Green | | Conservative | Seat held |
| Ashton-under-Lyne | | Labour | Angela Rayner | | Labour | Seat held |
| Aylesbury | | Conservative | Rob Butler | | Conservative | Incumbent, David Lidington, did not stand |
| Ayr, Carrick and Cumnock | | Conservative | Allan Dorans | | Scottish National | Incumbent, Bill Grant, did not stand |
| Banbury | | Conservative | Victoria Prentis | | Conservative | Seat held |
| Banff and Buchan | | Conservative | David Duguid | | Conservative | Seat held |
| Barking | | Labour | Margaret Hodge | | Labour | Seat held |
| Barnsley Central | | Labour | Dan Jarvis | | Labour | Seat held |
| Barnsley East | | Labour | Stephanie Peacock | | Labour | Seat held |
| Barrow and Furness | | Independent (The Independents) | Simon Fell | | Conservative | Incumbent, John Woodcock, did not stand |
| Basildon and Billericay | | Conservative | John Baron | | Conservative | Seat held |
| Basingstoke | | Conservative | Maria Miller | | Conservative | Seat held |
| Bassetlaw | | Vacant | Brendan Clarke-Smith | | Conservative | Incumbent, John Mann, did not stand |
| Bath | | Liberal Democrats | Wera Hobhouse | | Liberal Democrats | Seat held |
| Batley and Spen | | Labour Co-operative | Tracy Brabin | | Labour Co-operative | Seat held |
| Battersea | | Labour | Marsha de Cordova | | Labour | Seat held |
| Beaconsfield | | Independent | Joy Morrissey | | Conservative | Defeated incumbent, Dominic Grieve |
| Beckenham | | Conservative | Bob Stewart | | Conservative | Seat held |
| Bedford | | Labour | Mohammad Yasin | | Labour | Seat held |
| Belfast East | | DUP | Gavin Robinson | | DUP | Seat held |
| Belfast North | | DUP | John Finucane | | Sinn Féin | Defeated incumbent, Nigel Dodds |
| Belfast South | | DUP | Claire Hanna | | SDLP | Defeated incumbent, Emma Little-Pengelly |
| Belfast West | | Sinn Féin | Paul Maskey | | Sinn Féin | Seat held |
| Bermondsey and Old Southwark | | Labour | Neil Coyle | | Labour | Seat held |
| Berwick-upon-Tweed | | Conservative | Anne-Marie Trevelyan | | Conservative | Seat held |
| Berwickshire, Roxburgh and Selkirk | | Conservative | John Lamont | | Conservative | Seat held |
| Bethnal Green and Bow | | Labour | Rushanara Ali | | Labour | Seat held |
| Beverley and Holderness | | Conservative | Graham Stuart | | Conservative | Seat held |
| Bexhill and Battle | | Conservative | Huw Merriman | | Conservative | Seat held |
| Bexleyheath and Crayford | | Conservative | David Evennett | | Conservative | Seat held |
| Birkenhead | | Birkenhead Social Justice | Mick Whitley | | Labour | Defeated incumbent, Frank Field |
| Birmingham Edgbaston | | Labour Co-operative | Preet Gill | | Labour Co-operative | Seat held |
| Birmingham Erdington | | Labour | Jack Dromey | | Labour | Seat held |