M: 69 stores

• M and M Direct
• MacSpeech
• MacWarehouse
• Macdonald Hotels
• Madasafish
• Magazine Group
• Mainline Menswear
• Majestic Wine
• Mandarina Duck UK
• Mankind
• Maplin
• Marie-Chantal
• Marisota
• Marks and Spencer
• Marriott
• Marshall Ward
• Mastershoe & Myshu
• Matalan
• Match.com
• Maxavita
• Maximuscle
• Maxitone
• McAfee
• Meaningful Beauty
• Mecca Bingo
• Medic Animal
• MegaMoneyGames
• Metaboli UK
• Microsoft
• Millennium Hotels
• Millet Sports
• Millets
• MiniBarratts
• MiniModelShop
• Ministry of Sound
• Minxy Bingo
• Misco
• Miss Selfridge
• Misspenny
• Mobile Cash Monster
• Mobiles.co.uk
• Mobiles2YourDoor
• MondeBio UK
• Moneybookers
• Moo.com
• Moon Bingo
• Moss Bros
• Mothercare
• Motorcycle Parts and Accessories
• Mozy Remote Backup
• Murad
• Museum Selection
• Musicroom.com
• My Hobby Store Magazine
• My Mini Monsters
• My Party Parcel
• My Pet Universe
• My-Wardrobe.com
• MyBet.com
• MyMemory
• MyOffers
• Myakka
• Mybag
• mobile fun
• mp3cityguides
• myTuxedo
• myphotobook.co.uk
• myprinting
• mytyres.co.uk