All Stores A-Z
- M and Co
- M and M Direct
- Macback
- Macdonald Hotels
- Machine Mart
- Madame Tussauds
- Made.com
- Magazine.co.uk
- Magazines Direct
- MagicBreaks
- Mainline Menswear
- Maison Threads
- Malmaison
- MANKIND
- Manor Cottages
- Maple Parking
- Marella Cruises
- Marisota
- Mark Warner Holidays
- Marks and Spencer
- Masdings
- Master of Malt
- Matalan
- Mattress Next Day
- Mattress Online
- Mattressman
- Maverick and Wolf
- MaxCleavage
- Memory Foam Warehouse
- Menkind
- Mercury Holidays
- Merlin Cycles
- Mesh
- Metrofone
- Millets
- Mio Skincare
- Miss Selfridge
- Missguided
- Mister Spex
- Mitre For Home
- Mobile Phones Direct
- Mobiles.co.uk
- Mobit Airport Parking
- Moda in Pelle
- Molton Brown
- Momondo
- Monica Vinader
- Monsoon
- Monster Pet Supplies
- MonsterSupplements.com
- moo.com
- Morphy Richards
- Moss Bros
- Mothercare
- Mountain Warehouse
- Mozimo
- Mummy And Little Me
- Murad
- musicMagpie
- Musto
- My 1st Years
- My Duvet and Pillow
- My Favourite Magazines
- My Memory
- My Nametags
- My Tutor
- Myakka
- mychoice.co.uk
- myParcelDelivery
- MyProtein.com
- mytyres.co.uk
- myvitamins