| Aberafan Maesteg | Stephen Kinnock | 7 May 2015 |
| Airdrie and Shotts | Kenneth Stevenson | 4 July 2024 |
| Aldershot | Alex Baker | 4 July 2024 |
| Alloa and Grangemouth | Brian Leishman | 4 July 2024 |
| Altrincham and Sale West | Mr Connor Rand | 4 July 2024 |
| Alyn and Deeside | Sir Mark Tami | 7 June 2001 |
| Amber Valley | Linsey Farnsworth | 4 July 2024 |
| Ashford | Sojan Joseph | 4 July 2024 |
| Ashton-under-Lyne | Angela Rayner | 7 May 2015 |
| Aylesbury | Laura Kyrke-Smith | 4 July 2024 |
| Ayr, Carrick and Cumnock | Elaine Stewart | 4 July 2024 |
| Banbury | Sean Woodcock | 4 July 2024 |
| Bangor Aberconwy | Claire Hughes | 4 July 2024 |
| Barking | Nesil Caliskan | 4 July 2024 |
| Barnsley North | Dan Jarvis | 3 March 2011 |
| Barnsley South | Stephanie Peacock | 8 June 2017 |
| Barrow and Furness | Michelle Scrogham | 4 July 2024 |
| Basingstoke | Luke Murphy | 4 July 2024 |
| Bassetlaw | Jo White | 4 July 2024 |
| Battersea | Marsha De Cordova | 8 June 2017 |
| Beckenham and Penge | Liam Conlon | 4 July 2024 |
| Bedford | Mohammad Yasin | 8 June 2017 |
| Bermondsey and Old Southwark | Neil Coyle | 7 May 2015 |
| Bethnal Green and Stepney | Rushanara Ali | 6 May 2010 |
| Bexleyheath and Crayford | Daniel Francis | 4 July 2024 |
| Birkenhead | Alison McGovern | 6 May 2010 |
| Birmingham Erdington | Paulette Hamilton | 3 March 2022 |
| Birmingham Hall Green and Moseley | Tahir Ali | 12 December 2019 |
| Birmingham Hodge Hill and Solihull North | Liam Byrne | 15 July 2004 |
| Birmingham Ladywood | Shabana Mahmood | 6 May 2010 |
| Birmingham Northfield | Laurence Turner | 4 July 2024 |
| Birmingham Selly Oak | Al Carns | 4 July 2024 |
| Birmingham Yardley | Jess Phillips | 7 May 2015 |
| Bishop Auckland | Dr Sam Rushworth | 4 July 2024 |
| Blackley and Middleton South | Graham Stringer | 1 May 1997 |
| Blackpool North and Fleetwood | Lorraine Beavers | 4 July 2024 |
| Blackpool South | Chris Webb | 2 May 2024 |
| Blaenau Gwent and Rhymney | Nick Smith | 6 May 2010 |
| Blaydon and Consett | Liz Twist | 8 June 2017 |
| Blyth and Ashington | Ian Lavery | 6 May 2010 |
| Bolsover | Natalie Fleet | 4 July 2024 |
| Bolton North East | Kirith Entwistle | 4 July 2024 |
| Bolton South and Walkden | Yasmin Qureshi | 6 May 2010 |
| Bolton West | Phil Brickell | 4 July 2024 |
| Bootle | Peter Dowd | 7 May 2015 |
| Bournemouth East | Tom Hayes | 4 July 2024 |
| Bournemouth West | Jessica Toale | 4 July 2024 |
| Bracknell | Peter Swallow | 4 July 2024 |
| Bradford East | Imran Hussain | 7 May 2015 |
| Bradford South | Judith Cummins | 7 May 2015 |
| Bradford West | Naz Shah | 7 May 2015 |
| Brent East | Dawn Butler | 7 May 2015 |
| Brent West | Barry Gardiner | 1 May 1997 |
| Brentford and Isleworth | Ruth Cadbury | 7 May 2015 |
| Bridgend | Chris Elmore | 5 May 2016 |
| Brighton Kemptown and Peacehaven | Chris Ward | 4 July 2024 |
| Bristol East | Kerry McCarthy | 5 May 2005 |
| Bristol North East | Damien Egan | 15 February 2024 |
| Bristol North West | Darren Jones | 8 June 2017 |
| Bristol South | Karin Smyth | 7 May 2015 |
| Broxtowe | Juliet Campbell | 4 July 2024 |
| Buckingham and Bletchley | Callum Anderson | 4 July 2024 |
| Burton and Uttoxeter | Jacob Collier | 4 July 2024 |
| Bury North | Mr James Frith | 4 July 2024 |
| Bury South | Christian Wakeford | 12 December 2019 |