L
| Laing, Eleanor Epping Forest | C |
| Lamb, Norman Norfolk North | LD |
| Lammy, David Tottenham | Lab |
| Lancaster, Mark Milton Keynes North | C |
| Lansley, Andrew Cambridgeshire South | C |
| Latham, Pauline Derbyshire Mid | C |
| Lavery, Ian Wansbeck | Lab |
| Laws, David Yeovil | LD |
| Lazarowicz, Mark Edinburgh North & Leith | Lab |
| Leadsom, Andrea Northamptonshire South | C |
| Lee, Dr Philip Bracknell | C |
| Lee, Jessica Erewash | C |
| Leech, John Manchester Withington | LD |
| Lefroy, Jeremy Stafford | C |
| Leigh, Edward Gainsborough | C |
| Leslie, Charlotte Bristol North West | C |
| Leslie, Christopher Nottingham East | Lab |
| Letwin, Oliver Dorset West | C |
| Lewis, Ivan Bury South | Lab |
| Lewis, Brandon Great Yarmouth | C |
| Lewis, Julian New Forest East | C |
| Liddell-Grainger, Ian Bridgwater & Somerset West | C |
| Lidington, David Aylesbury | C |
| Lilley, Peter Hitchin & Harpenden | C |
| Lloyd, Stephen Eastbourne | LD |
| Lloyd, Tony Manchester Central | Lab |
| Llwyd, Elfyn Dwyfor Meirionnydd | PC |
| Long, Naomi Belfast East | Alliance |
| Lopresti, Jack Filton & Bradley Stoke | C |
| Lord, Jonathan Woking | C |
| Loughton, Tim Worthing East & Shoreham | C |
| Love, Andy Edmonton | Lab |
| Lucas, Dr Caroline Brighton Pavilion | Green |
| Lucas, Ian Wrexham | Lab |
| Luff, Peter Worcestershire Mid | C |
| Lumley, Karen Redditch | C |
M
| Macleod, Mary Brentford & Isleworth | C |
| MacNeil, Angus Na h-Eileanan an Iar | SNP |
| MacShane, Denis Rotherham | Lab |
| Mactaggart, Fiona Slough | Lab |
| Mahmood, Shabana Birmingham Ladywood | Lab |
| Mahmood, Khalid Birmingham Perry Barr | Lab |
| Main, Anne St Albans | C |
| Mann, John Bassetlaw | Lab |
| Marsden, Gordon Blackpool South | Lab |
| Maude, Francis Horsham | C |
| May, Theresa Maidenhead | C |
| Maynard, Paul Blackpool North & Cleveleys | C |
| McCabe, Steve Birmingham Selly Oak | Lab |
| McCann, Michael East Kilbride, Strathaven | |
| & Lesmahagow | Lab |
| McCarthy, Kerry Bristol East | Lab |
| McCartney, Jason Colne Valley | C |
| McCartney, Karl Lincoln | C |
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