- 1M by Montcalm
- 2M Shed
- 3M40 J15 Warwick Hotel
- 4Macdonald Alveston Manor Hotel
- 5Macdonald Aviemore Resort
- 6Macdonald Bath Spa Hotel
- 7Macdonald Bear Hotel
- 8Macdonald Berystede Hotel
- 9Macdonald Botley Park Hotel
- 10Macdonald Burlington Hotel
- 11Macdonald Cardrona Hotel Golf & Spa
- 12Macdonald Compleat Angler
- 13Macdonald Craxton Wood Hotel
- 14Macdonald Crutherland House
- 15Macdonald Drumossie Hotel
- 16Macdonald Elmers Court Hotel & Resort
- 17Macdonald Frimley Hall Hotel & Spa
- 18Macdonald Hill Valley Hotel Golf & Spa
- 19Macdonald Houstoun House
- 20Macdonald Inchyra Hotel & Spa
- 21Macdonald Kilhey Court
- 22Macdonald Leeming House
- 23Macdonald Linden Hall Hotel
- 24Macdonald New Blossoms Hotel
- 25Macdonald Norwood Hall Hotel
- 26Macdonald Old England Hotel & Spa
- 27Macdonald Pittodrie House
- 28Macdonald Portal Hotel, Golf & Spa
- 29Macdonald Tickled Trout Hotel
- 30Macdonald Windsor Hotel
- 31Machynys Peninsula Golf Club & Premier Spa
- 32Mackintosh at the Willow
- 33Madame Tussauds London
- 34Maddox Club
- 35Madison Restaurant Bar & Cafe
- 36Maenllwyd Inn
- 37Maesmawr Hall Hotel
- 38Magazine London
- 39Magicians.co.uk
- 40Magna Events
- 41Maidens Tower at Leeds Castle
- 42Majestic Hotel Eastbourne
- 43Makeney Hall Hotel
- 44Mallory Court Country House Hotel & Spa
- 45Mallyan Spout Hotel
- 46Malmaison Aberdeen
- 47Malmaison Belfast
- 48Malmaison Birmingham
- 49Malmaison Brighton
- 50Malmaison Dundee
- 51Malmaison Edinburgh
- 52Malmaison Glasgow
- 53Malmaison Leeds
- 54Malmaison Liverpool
- 55Malmaison Manchester
- 56Malmaison Newcastle
- 57Malmaison Oxford
- 58Malmaison Reading
- 59Malmaison York
- 60Malt House
- 61Malt Shovel Inn
- 62Malthouse Farm
- 63Maltsters Arms
- 64Maltsters, Llandaff
- 65Maltsters, Whitchurch
- 66Manahatta Deansgate - Manchester
- 67Manahatta Edinburgh
- 68Manahatta Greek Street - Leeds
- 69Manahatta Headingley - Leeds
- 70Manahatta Merrion Street - Leeds
- 71Manahatta Newcastle
- 72Manahatta Nottingham
- 73Manahatta Parliament Street - Harrogate
- 74Manahatta Sheffield
- 75Manahatta Temple Street - Birmingham
- 76Manahatta York
- 77Manchester Airport Stanley Hotel | Signature Collection by Best Western
- 78Manchester Marriott Piccadilly Hotel
- 79Manchester Marriott Victoria & Albert Hotel
- 80Manchester South Hotel | Sure Collection by Best Western
- 81Manchester United Football Club - Old Trafford
- 82Manchester United Women's Football Club
- 83Manchester235
- 84Mandarin Oriental Hyde Park
- 85Mandeville Hotel
- 86Mango Tree
- 87Manor By The Lake
- 88Manor Farm, Worcester
- 89Manor House Hotel
- 90Mansion House Edinburgh Zoo
- 91Mansion House Harvester
- 92Maple Restaurant & Bar
- 93Marco Pierre White Steakhouse Birmingham
- 94Marco's at the Old Red Lion
- 95Marco's New York Italian Birmingham Airport
- 96Marco's New York Italian Sheffield
- 97Mare & Colt
- 98Marine Hotel Llandudno
- 99Marine Hotel Paignton
- 100Maritime Museum Liverpool
- 101Market House
- 102Market Rasen Racecourse
- 103Market Rasen/Rowley Mile Racecourse
- 104Market Tavern
- 105Marks Tey Hotel
- 106Marlborough Arms
- 107Marlborough Head
- 108Marquis of Granby
- 109Marsh Farm Hotel
- 110Marton Mere Holiday Village
- 111Marwell Hotel
- 112Mary Janes Bar
- 113Marylebone Cricket Club
- 114MASH London
- 115Masons Arms, Ramsbottom
- 116Master Mariner
- 117Match Bar
- 118Maxwell’s Bar & Grill
- 119Maybush Inn
- 120Mayflower Hotel
- 121Mayfly, Folkestone
- 122Maze Gordon Ramsay
- 123Maze Grill Gordon Ramsay
- 124Meadow Farm, Redditch
- 125Mentmore Golf & Country Club
- 126Meon Valley Hotel & Country Club
- 127Meon Valley Marriott Hotel & Country Club
- 128Mercedes-Benz World
- 129Mercure Aberdeen Caledonian Hotel
- 130Mercure Altrincham Bowdon Hotel
- 131Mercure Ayr Hotel
- 132Mercure Bedford Centre Hotel
- 133Mercure Bewdley the Heath Hotel, Kidderminster
- 134Mercure Birmingham West Hotel
- 135Mercure Blackburn Dunkenhalgh Hotel and Spa
- 136Mercure Blackburn Foxfields Country Hotel
- 137Mercure Bolton Georgian House Hotel
- 138Mercure Bournemouth Queens Hotel & Spa
- 139Mercure Bradford, Bankfield Hotel
- 140Mercure Brandon Hall Hotel & Spa, Warwickshire
- 141Mercure Bridgwater Hotel
- 142Mercure Brighton Seafront Hotel
- 143Mercure Bristol Brigstow Hotel
- 144Mercure Bristol Grand Hotel
- 145Mercure Bristol Holland House Hotel
- 146Mercure Bristol North, The Grange Hotel
- 147Mercure Cardiff Holland House Hotel and Spa
- 148Mercure Cardiff North Hotel
- 149Mercure Chester Abbots Well Hotel
- 150Mercure Chester North Woodhey House Hotel
- 151Mercure Darlington Kings Hotel
- 152Mercure Dartford Brands Hatch Hotel and Spa
- 153Mercure Daventry Court Hotel
- 154Mercure Dorking White Horse Hotel
- 155Mercure Edinburgh City - Princes Street Hotel
- 156Mercure Exeter Rougemont Hotel
- 157Mercure Exeter Southgate Hotel
- 158Mercure Farnham Bush Hotel
- 159Mercure George Hotel Reading
- 160Mercure Glasgow City Hotel
- 161Mercure Gloucester, Bowden Hall Hotel
- 162Mercure Hatfield Oak Hotel
- 163Mercure Haydock Hotel
- 164Mercure Hotel Newport
- 165Mercure Hotel Nottingham City Centre
- 166Mercure Hull Grange Park Hotel
- 167Mercure Hythe Imperial Hotel & Spa
- 168Mercure Inverness Hotel
- 169Mercure Leeds Parkway Hotel
- 170Mercure Liverpool Atlantic Tower Hotel
- 171Mercure Livingston Hotel
- 172Mercure London Bloomsbury
- 173Mercure London Bridge Hotel
- 174Mercure London City Bankside
- 175Mercure London Hyde Park
- 176Mercure London Kensington
- 177Mercure London Paddington
- 178Mercure London Staines Upon Thames Hotel
- 179Mercure Maidstone Great Danes Hotel
- 180Mercure Manchester Norton Grange Hotel and Spa
- 181Mercure Manchester Piccadilly Hotel
- 182Mercure Milton Keynes Hotel
- 183Mercure Milton Keynes Hotel
- 184Mercure Newbury Elcot Park Hotel
- 185Mercure Northampton Town Centre
- 186Mercure Norton Grange Hotel & Spa
- 187Mercure Norwich Hotel
- 188Mercure Nottingham Sherwood Hotel
- 189Mercure Oxford Eastgate Hotel
- 190Mercure Oxford Hawkwell House
- 191Mercure Paignton Hotel
- 192Mercure Perth Hotel
- 193Mercure Salisbury White Hart Hotel
- 194Mercure Sheffield Kenwood Hall & Spa
- 195Mercure Sheffield Parkway Hotel
- 196Mercure Sheffield St Paul's Hotel and Spa
- 197Mercure St Albans Noke Hotel
- 198Mercure Stafford South Hatherton House Hotel
- 199Mercure Stratford-upon-Avon Shakespeare Hotel
- 200Mercure Swansea
- 201Mercure Tankersley Manor
- 202Mercure Telford Centre Hotel
- 203Mercure Telford Madeley Court Hotel
- 204Mercure Tunbridge Wells Hotel
- 205Mercure Warwickshire Walton Hall Hotel
- 206Mercure Wetherby Hotel
- 207Mercure Winchester Wessex Hotel
- 208Mercure York Fairfield Manor Hotel
- 209Mere Court Hotel & Conference Centre
- 210Merlins Cave
- 211Merrie Garden, Sandown
- 212Merrie Harrier
- 213Merrist Wood Golf Club
- 214Metropolitan Bushey
- 215Mews of Mayfair
- 216Mharsanta Restaurant & Bar
- 217MIC Hotel and Conference Centre
- 218Middlemore Farm, Daventry
- 219Middlethorpe Hall & Spa
- 220Middletons Hotel
- 221Milford Golf Club
- 222Mill Farm, Cannock
- 223Mill Green Golf Club
- 224Mill Hotel
- 225Mill Inn
- 226Mill Rythe Holiday Village
- 227Millennium Gloucester Hotel London Kensington
- 228Millennium Hotel London Knightsbridge
- 229Millennium Point
- 230Millennium Stadium
- 231Millers Bar and Restaurant
- 232Millers Hotel, Sibson
- 233Millstone at Mellor
- 234Milnes Bar
- 235Milton Hill House
- 236Ministry of Sound
- 237Minster Mill
- 238Mint Leaf Lounge & Restaurant
- 239Mint Leaf Restaurant & Bar
- 240Missenden Abbey
- 241Mitton Hall
- 242MK Dons Football Club
- 243Moddershall Oaks Country Spa Retreat
- 244Modello Yeovil
- 245Modern Life Cafe
- 246Moka Crawley
- 247Moka Lincoln
- 248Molineux Stadium – Wolverhampton Wanderers FC
- 249Momo
- 250Monachty
- 251Monkey Island Estate
- 252Monkfield Arms, Cambourne
- 253Moon & Sixpence
- 254Moor Park Mansion
- 255Moot House Social Club
- 256Morden Hall
- 257More Bar and Brasserie
- 258Morecambe Football Club
- 259Mosborough Hall Hotel
- 260Mosimann's
- 261Motcombs Restaurant
- 262Moti Mahal Restaurant
- 263Motley Manchester
- 264Motorpoint Arena Cardiff
- 265Mottram Hall
- 266Mount Pleasant Ecological Park
- 267Mour Hotel
- 268Movida London
- 269Moyse's Hall
- 270Moyse's Hall
- 271Mozzarella Joes
- 272Mr Mulligans Birmingham
- 273Mr Mulligans Bournemouth
- 274Mr Mulligans Cheltenham
- 275Mr Mulligans Milton Keynes
- 276Mr Mulligans Newcastle
- 277Mr Mulligans Stevenage
- 278MSI - Museum of Science and Industry
- 279Mulberry
- 280Mulberry Bush
- 281Mulberry House
- 282Mundy Arms
- 283Municipal Hotel Liverpool - MGallery
- 284Murano Restaurant
- 285Murrayfield Stadium
- 286Murraypark Hotel
- 287Murrayshall Hotel & Golf Courses
- 288Museum & Art Gallery on The Strand
- 289Museum & Art Gallery on The Wardwick
- 290Museum of Liverpool
- 291Museum Of London
- 292Museum Of London Docklands
- 293Museum of Making at Derby Silk Mill
- 294Museum of The Order of St John
- 295Museum Tavern
- 296MusicRoomSpaceEvents
- 297Mustard Bar, Lounge & Restaurant
- 298Muthu Belstead Brook Hotel
- 299Muthu Clumber Park Hotel & Spa
- 300Muthu Glasgow River Hotel
- 301Muthu Newton Hotel
- 302Muthu Westcliff Hotel
- 303myhotel Bloomsbury
- 304myhotel Brighton
- 305myhotel Chelsea
- 306Myton House Farm, Stockton On Tees
