Stores beginning with letter M
- M&Co
- MMOGA
- MOO UK
- Macdonald Hotel
- Machine Mart
- Made.com
- Magic Madhouse
- Mainline Menswear
- Malmaison
- MandMDirect
- Mango Shop
- Mankind
- Manuka Doctor
- Maplin
- Marisota
- Marks and Spencer
- Matalan Direct
- Match
- MaxCleavage
- Maxinutrition
- Maxwells DIY
- Melia
- MenKind
- Menlook
- Merlin Cycles UK
- Mighty Deals
- Millbry Hill
- Millet Sports
- Millets
- Minerva Crafts
- Miss Selfridge
- Missguided
- Mobile Phones Direct
- Moda in Pelle
- Monarch
- Monsoon
- Monster Pet Supplies
- Monster Supplements
- Moonpig
- Morphy Richards
- Moss Bros
- Mothercare
- Mountain Warehouse
- Mozimo
- Multiyork
- Museum Selection
- My Fabrics
- My Photo Puzzle
- MyBag
- MyMemory.co.uk
- Myakka
- Myprotein
- Mytyres.co.uk
- mahabis
- mybet