Lord | Cariche
- Baroni Leominster
- Baroni Leveson
- Baroni Levingston
- Baroni Lexington
- Baroni Lilford
- Baroni Lindsay of Balcarres
- Baroni Lindsay of the Byres
- Baroni Linton and Caberston
- Baroni Lloyd
- Baroni Loch
- Baroni Loughborough
- Baroni Lovat
- Baroni Lucy
- Baroni Ludquhairne
- Baroni Luke
- Baroni Lumley
- Baroni Lurgan
- Baroni Lyell
- Baroni Lyttelton
- Baroni Macdonald de Slate
- Baroni Macdonald of Slate
- Baroni Maltravers
- Baroni Manny
- Baroni Margadale
- Baroni Mauchline
- Baroni Maxwell
- Baroni Mayhew de Twysden
- Baroni Mendlesham
- Baroni Methven
- Baroni Middleton
- Baroni Molines
- Baroni Monk Breton
- Baroni Monk Bretton
- Baroni Montacute
- Baroni Montagu
- Baroni Montagu de Beaulieu
- Baroni Montagu de Boughton
- Baroni Montagu of Boughton
- Baroni Monteagle
- Baroni Montgomerie
- Baroni Mordaunt
- Baroni Mornington
- Baroni Mortimer
- Baroni Mount Stuart
- Baroni Mountbatten
- Baroni Mountjoy
- Baroni Mowbray
- Baroni Moyne
- Baroni Mulgrave
- Baroni Nairne