Stores - M
- MAC Cosmetics
- MacBack
- Macdonald Hotels
- Machine Mart
- MacKeeper
- Macron
- Made Here With Love
- Made In Paradis
- Made With Love and Sparkle
- Made.com
- Madeleine
- Mademoiselle Home
- Madison and Mayfair Homeware
- Mael Interiors
- Mafalda
- Mafett
- Magee 1866
- Magformers
- Magicvision
- Magix
- Magnitone
- Magnum Boots
- Mahabis
- Maia Studios
- Maidesite UK
- Mainline Menswear
- Maison Vide
- Malin + Goetz
- Mallet
- Mama Bamboo
- MamaMio
- Mamas and Papas
- MANAWA
- Manfrotto
- Mankind
- Mantra Jewellery
- Maplin
- Mappin & Webb
- Maqio
- Marco Paul
- Margot Fox Jewellery
- Marks & Spencer
- Marks and Spencer
- Marks Electrical
- Marloe Watch Company
- MartialArts Megastore
- Martin Dawes
- MarvinsDen
- Master & Dynamic
- Mastershoe
- Mastertrap
- Matilde Jewellery
- Mattress Man
- Mattress Online
- Mattressman
- Maverick & Co.
- Maverick & Wolf
- Max Mattress
- Maxpeeding Rods
- Maxwell Scott Bags
- Maya Brenner
- MayfairSilk
- MCM
- MD London
- Meaco
- Medterra CBD
- Meerah Belle
- Meerveil
- meli melo
- Melia
- Mellow Store
- Melmand
- Memory Foam Warehouse
- Menkind
- Merlin Cycles
- Meross
- Merrell
- Mersey Raw
- Mersey Raw Dog Food
- Mesh Computers
- Metrofone
- Mevano
- Meyba
- MGP Nutrition
- Michael Kors
- Micralite UK
- Microsoft
- Micucci
- Micucci Interiors
- Midlands Boutique
- Mighty Green
- Mighty Pea
- MiiN Cosmetics
- MIKI HOUSE
- Milano Couture
- Milanoo
- Milease UK
- Milky Plant
- Millennium Hotels
- Millie & Ralph
- Minerva
- Minerva Crafts
- Minga London
- Mini Model Shop
- minicabit
- Minifigures.com
- Miniinthebox.com
- Miniml
- Minisforum
- MINOX
- Mint Outdoor
- Mio Skincare
- Miravvi
- Mirror Outlet
- Miss Foxy
- Miss Patina
- Mission C
- Missoma
- Misspap
- Mistral Online
- Mitre
- Mitre Linen
- Mix
- Mizar & Alcor
- Mo Joe's
- Mobile Direct
- Mobile Phones Direct
- Mobile Reborn
- Mobile Sales
- Mobiles.co.uk
- Modelones
- Modern Comfort Living
- Modes
- Modmo
- Molton Brown
- Momcozy
- Money Clothing
- Mono Pillow
- Monsgeek
- Monster Pet Supplies
- Montblanc
- Montirex
- MOO
- Mood & Mane
- Moody Tiger
- Moose
- Morale Garden Furniture
- Morale Home Furnishings
- Morgan & French
- Moss Bros Hire
- Motoin
- Mountain Warehouse
- Mous
- Move Pre-Workout
- MowDirect
- Mowers Online
- Moyses Stevens Flowers
- MOYU
- Mozillion
- MPS
- Mr Central Heating
- MRDrippz
- Mstore
- Muc Off
- Munbyn
- Murdock
- Muscle And Strength
- Musical Images
- Musto
- My 1st Years
- My Baby Memories
- My Fabulosa
- My Geek Box
- My Health Sanctuary
- My Last Rolo
- My M&M's
- My Mini Maker
- My Nametags
- My Outdoor Kitchen
- My Outlet Store
- My Panda Life
- My Private Villas
- My Scoot
- My Supper Hero
- My Tool Shed
- My Urban Wardrobe
- My Wellness
- MyBag
- MYCO Works
- MyEcoBikes
- MyFlowers
- MyFooDen
- MyHolidays
- MyHungryPet
- Mylee
- MyMemory
- Myo band
- MYO Plant Nutrition
- Myprotein
- Myrentacar
- MyScoot
- Mystery Box Shop
- Mystery Shirt Club
- Mystic Moments
- Mytyres.co.uk
- Myvegan
- MyVitamins
- MyZenoo
- MyZone