| Liverpool Riverside | Kim Johnson | 12 December 2019 |
| Liverpool Walton | Dan Carden | 8 June 2017 |
| Liverpool Wavertree | Paula Barker | 12 December 2019 |
| Liverpool West Derby | Ian Byrne | 12 December 2019 |
| Livingston | Gregor Poynton | 4 July 2024 |
| Llanelli | Dame Nia Griffith | 5 May 2005 |
| Loughborough | Dr Jeevun Sandher | 4 July 2024 |
| Lowestoft | Jess Asato | 4 July 2024 |
| Luton North | Sarah Owen | 12 December 2019 |
| Luton South and South Bedfordshire | Rachel Hopkins | 12 December 2019 |
| Macclesfield | Tim Roca | 4 July 2024 |
| Manchester Rusholme | Afzal Khan | 8 June 2017 |
| Manchester Withington | Jeff Smith | 7 May 2015 |
| Mansfield | Steve Yemm | 4 July 2024 |
| Merthyr Tydfil and Aberdare | Gerald Jones | 7 May 2015 |
| Mid and South Pembrokeshire | Henry Tufnell | 4 July 2024 |
| Mid Cheshire | Andrew Cooper | 4 July 2024 |
| Mid Derbyshire | Jonathan Davies | 4 July 2024 |
| Middlesbrough and Thornaby East | Andy McDonald | 29 November 2012 |
| Middlesbrough South and East Cleveland | Luke Myer | 4 July 2024 |
| Milton Keynes Central | Emily Darlington | 4 July 2024 |
| Milton Keynes North | Chris Curtis | 4 July 2024 |
| Mitcham and Morden | Dame Siobhain McDonagh | 1 May 1997 |
| Monmouthshire | Catherine Fookes | 4 July 2024 |
| Montgomeryshire and Glyndŵr | Steve Witherden | 4 July 2024 |
| Morecambe and Lunesdale | Lizzi Collinge | 4 July 2024 |
| Motherwell, Wishaw and Carluke | Pamela Nash | 4 July 2024 |
| Na h-Eileanan an Iar | Torcuil Crichton | 4 July 2024 |
| Neath and Swansea East | Carolyn Harris | 7 May 2015 |
| Newcastle upon Tyne Central and West | Dame Chi Onwurah | 6 May 2010 |
| Newcastle upon Tyne East and Wallsend | Mary Glindon | 6 May 2010 |
| Newcastle upon Tyne North | Catherine McKinnell | 6 May 2010 |
| Newcastle-under-Lyme | Adam Jogee | 4 July 2024 |
| Newport East | Jessica Morden | 5 May 2005 |
| Newport West and Islwyn | Ruth Jones | 4 April 2019 |
| Newton Aycliffe and Spennymoor | Alan Strickland | 4 July 2024 |
| Normanton and Hemsworth | Jon Trickett | 1 February 1996 |
| North Ayrshire and Arran | Irene Campbell | 4 July 2024 |
| North Durham | Luke Akehurst | 4 July 2024 |
| North East Derbyshire | Louise Sandher-Jones | 4 July 2024 |
| North East Hertfordshire | Chris Hinchliff | 4 July 2024 |
| North Northumberland | David Smith | 4 July 2024 |
| North Somerset | Sadik Al-Hassan | 4 July 2024 |
| North Warwickshire and Bedworth | Rachel Taylor | 4 July 2024 |
| North West Cambridgeshire | Sam Carling | 4 July 2024 |
| North West Leicestershire | Amanda Hack | 4 July 2024 |
| Northampton North | Lucy Rigby | 4 July 2024 |
| Northampton South | Mike Reader | 4 July 2024 |
| Norwich South | Clive Lewis | 7 May 2015 |
| Nottingham East | Nadia Whittome | 12 December 2019 |
| Nottingham South | Lilian Greenwood | 6 May 2010 |
| Nuneaton | Jodie Gosling | 4 July 2024 |
| Oldham East and Saddleworth | Debbie Abrahams | 13 January 2011 |
| Ossett and Denby Dale | Jade Botterill | 4 July 2024 |
| Paisley and Renfrewshire North | Alison Taylor | 4 July 2024 |
| Paisley and Renfrewshire South | Johanna Baxter | 4 July 2024 |
| Pendle and Clitheroe | Jonathan Hinder | 4 July 2024 |
| Penistone and Stocksbridge | Dr Marie Tidball | 4 July 2024 |
| Penrith and Solway | Markus Campbell-Savours | 4 July 2024 |
| Plymouth Moor View | Fred Thomas | 4 July 2024 |
| Pontefract, Castleford and Knottingley | Yvette Cooper | 1 May 1997 |
| Pontypridd | Alex Davies-Jones | 12 December 2019 |
| Poole | Neil Duncan-Jordan | 4 July 2024 |
| Poplar and Limehouse | Apsana Begum | 12 December 2019 |
| Portsmouth North | Amanda Martin | 4 July 2024 |