| Ladyhill House Hotel, Hill Street, Elgin | Elgin | Hotel | | | |
| Laichmoray Hotel, Station Road, Elgin | Elgin | Hotel | | | |
| Lairhillock Inn [wd] | Aberdeen | Gasthaus | | | |
| Lakeside Guest House [wd] | Oxford | Hotel | | | |
| Lakeside Park Hotel & Spa [wd] | Ryde | Hotel | | | |
| Lamb And Fountain Inn | Beckington | Gasthaus | | | |
| Lammas Park House | Torquay | Hotel | | | |
| Lamorna Hotel | Torquay | Hotel | | | |
| Lamprey Hotel | Gloucester | Hotel | | | |
| Lancaster Barn [wd] | Bay Horse | Hotel | | | |
| Lands of Loyal Hotel [wd] | Dundee | Hotel | | | |
| Landseer House [wd] | Chichester | Hotel | | | |
| Lanercost Country B&B [wd] | Carlisle | Hotel | | | |
| Langdale House [wd] | St Austell | Hotel | | | |
| Langdon Farm Guest House [wd] | Pembrokeshire | Hotel | | | |
| Langdon Villa Guest House [wd] | St Clears | Hotel | | | |
| Langleigh Country House Hotel | Barnstaple | Hotel | | | |
| Langshott Manor [wd] | Gatwick | Hotel | | | |
| Langston Priory | Witney | Hotel | | | |
| Langstone Hotel | Havant | Hotel | | | |
| Lann Dearg Studios [wd] | Highlands | Hotel | | | |
| Lansbury Heritage Hotel [wd] | Stratford | Hotel | | | |
| Lansdowne Hotel, including block to rear in Lansdowne Terrace | Merthyr Tydfil | Hotel | | | |
| Lansdowne House With Private Car Park [wd] | Llandudno | Hotel | | | |
| Larkrise Cottage Bed and Breakfast [wd] | Stratford-upon-Avon | Hotel | | | |
| Last Drop Village Hotel and Spa [wd] | Bolton | Hotel | | | |
| Lastra Farm Hotel [wd] | Anglesey | Hotel | | | |
| Latimer House [wd] | Kendal | Hotel | | | |
| Lauderville Guest House [wd] | Edinburgh | Hotel | | | |
| Laurel Cottage Bowness [wd] | Kendal | Hotel | | | |
| Laurel House Bed and Breakfast [wd] | Cheltenham | Hotel | | | |
| Le Bouchon Brasserie & Hotel [wd] | Maldon | Hotel | | | |
| Le Monde Hotel [wd] | Edinburgh | Hotel | | | |
| Le Petit Chateau & William de Percy [wd] | Northumberland | Hotel | | | |
| Le Strange Arms Hotel | Kings Lynn The Red Mount | Hotel | | | |
| Lea Hill Farm Hotel | Ilminster | Hotel | | | |
| Leach House, attached cottage and outbuilding | Sheffield | Gasthaus | | | |
| Leam Hotel | Leamington Spa | Hotel | | | |
| Leander Club [wd] | Marlow | Hotel | | | |
| Leeming Wells [wd] | Keighley | Hotel | | | |
| Leeward House [wd] | Gosport | Hotel | | | |
| Leicester Marriott Hotel [wd] | Leicester | Hotel | | | |
| Leman Locke [wd] | Islington | Hotel | | | |
| Let's Edinburgh [wd] | Edinburgh | Aparthotel | | | |
| Limes | Needham Market | Gasthaus | | | |
| Lincoln Plaza London, Curio Collection by Hilton | Stratford | Hotel | 2018 | | |
| Lincombe Hall Hotel & Spa - Just for Adults [wd] | Torquay | Hotel | | | |
| Linden Bed & Breakfast [wd] | Kings Lynn The Red Mount | Hotel | | | |
| Lindens Hotel | Llandudno | Hotel | | | |
| Lindeth Fell Country House [wd] | Kendal | Hotel | | | |
| Lindeth Howe [wd] | Kendal | Hotel | | | |
| Lindors | Aust | Landhaushotel | | | |
| Lingwood Lodge [wd] | Kendal | Hotel | | | |
| Links Hotel, 3 Alvanley Terrace, Edinburgh | Edinburgh | Hotel | | | |
| Links Lodge - B&B [wd] | Elgin | Hotel | | | |
| Linnets Hotel | Clacton-on-Sea | Hotel | | | |
| Linthwaite House Hotel [wd] | Kendal | Hotel | | | |
| Linton Collection - 28 North Bridge [wd] | Edinburgh | Hotel | | | |
| Lismoyne Hotel [wd] | Fleet | Hotel | | | |
| Lisnacurran Country House [wd] | Lisburn | Hotel | | | |
| Lister's Arms Hotel | Keighley | Hotel | | | |
| Little Bullocks Farm [wd] | Great Dunmow | Hotel | | | |
| Little Court [wd] | Weymouth | Hotel | | | |
| Little Dane Court [wd] | Ashford | Hotel | | | |
| Little Foxes Hotel [wd] | Crawley | Hotel | | | |
| Little Lodge [wd] | Lutterworth | Hotel | | | |
| Little Norton Mill [wd] | Yeovil | Hotel | | | |
| Littlecourt Hotel | Exeter | Hotel | | | |
| Liverpool City Centre by BridgeStreet [wd] | Liverpool | Hotel | | | |
| Llangollen Hostel [wd] | Rhostyllen | Hotel | | | |
| LLety Cynin [wd] | St Clears | Hotel | | | |
| Llindir Inn | Rhyl | Gasthaus | | | |
| Llwyn Onn Hall | Wrexham | Hotel | | | |
| Llyndir Hall Hotel | Wrexham | Hotel | | | |
| Loch Leven Inn, 6 Swan's Acre, Kinross | Kinross | Gasthaus | | | |
| Loch Lomond Castle Hotel, Loch Lomond | Helensburgh | Hotel | | | |
| Loch Ryan Hotel | Worcester | Hotel | | | |
| Lochardil Hotel, Startherrick Road, Inverness | Inverness | Hotel | | | |
| Lochinver Guesthouse [wd] | Ayr | Hotel | | | |
| Lock & Key Hotel [wd] | Liverpool | Hotel | | | |
| Lock Tavern [wd] | Ipswich | Hotel | | | |
| Locke at Broken Wharf [wd] | London | Hotel | | | |
| Lockerbie House Hotel | Dumfries | Hotel | | | |
| Lockgate Dairy [wd] | Chichester | Hotel | | | |
| Locomotive Inn | Torquay | Gasthaus | | | |
| Lodge Farmhouse Bed & Breakfast [wd] | Ringwood | Hotel | | | |
| Londesborough Hotel | Lyndhurst | Hotel | | | |
| London Bridge Hotel [wd] | London | Hotel | | | |
| London Hotel | Amesbury | Hotel | | | |
| London House Hotel [wd] | City of Westminster | Hotel | | | |
| London Inn | Paignton | Gasthaus | | | |
| London Inn | Paignton | Gasthaus | | | |
| London Marriott Hotel Maida Vale [wd] | King’s Cross (London) | Hotel | | | |
| London Marriott Hotel Twickenham [wd] | Twickenham | Hotel | | | |
| London Town Hotel [wd] | Fulham | Hotel | | | |
| Long Crendon Manor B&B [wd] | Thame | Hotel | | | |
| Longbridge House [wd] | Glastonbury | Hotel | | | |
| Longmead House [wd] | Barnstaple | Hotel | | | |
| Longview Hotel, 122-6 High Street, Forres | Elgin | Hotel | | | |
| Lonsdale House Hotel | Barrow-in-Furness | Hotel | | | |
| Lord Bute [wd] | Christchurch | Hotel | | | |
| Lord Leycester Hotel Annexe | Leamington Spa | Hotel | | | |
| Loriston Guest House [wd] | Eastbourne | Hotel | | | |
| Lorna Doone House [wd] | Barnstaple | Hotel | | | |
| Lorne House Bed & Breakfast [wd] | Bath | Hotel | | | |
| Losehill House Hotel & Spa [wd] | Glossop | Hotel | | | |
| Lovesgrove Country Guest House [wd] | Pembrokeshire | Hotel | | | |
| Lowther House [wd] | Scarborough | Hotel | | | |
| Lubnaig Guest House [wd] | Stirling | Hotel | | | |
| Lulworth Lodge [wd] | Weymouth | Hotel | | | |
| Lumb Farm Country Club [wd] | Alfreton | Hotel | | | |
| Lynbar Hotel [wd] | Blackpool | Hotel | | | |
| Lyndene [wd] | Barnsley | Hotel | | | |
| Lynmouth Bridge Hotel | Barnstaple | Hotel | | | |
| Lynnhurst Hotel [wd] | Paisley | Hotel | | | |
| Macdonald Craxton Wood Hotel & Spa [wd] | Eastham | Hotel | | | |
| MacDonald Hotel [wd] | King’s Cross (London) | Hotel | | | |
| Macdonald Houstoun House [wd] | Livingston | Hotel | | | |
| Macdonald Norwood Hall Hotel [wd] | Aberdeen | Hotel | | | |
| Macdonald Tickled Trout Hotel [wd] | Preston | Hotel | | | |
| Macdonald Windsor [wd] | Slough | Hotel | | | |
| Madeira Hall | Insel Wight | Hotel | | | |
| Magpies Lodge [wd] | Horsham | Hotel | | | |
| Maison Dieu Guest House [wd] | Dover | Hotel | | | |
| Maitlandfield Hotel, 29 Sidegate, Haddington | Leith | Hotel | | | |
| Maldon Grey Inn | Colchester | Gasthaus | | | |
| Maldron Hotel Derry [wd] | Derry | Hotel | | | |
| Maldron Hotel Newcastle [wd] | Newcastle upon Tyne | Hotel | | | |
| Mallory Court Hotel | Leamington Spa | Hotel | | | |
| Malmaison Birmingham [wd] | Birmingham | Hotel | | | |
| Malt Scoop Inn Village Stores | Okehampton | Gasthaus | | | |
| Mama Shelter London - Shoreditch | Islington | Hotel | | Mama Shelter | |
| Manchester Marriott Victoria & Albert Hotel [wd] | Manchester | Hotel | | | |
| Mandarin Oriental Mayfair, London | London | Hotel | 2024 | | mandarinoriental.com |
| Mandeley Guest House [wd] | Hayle | Hotel | | | |
| Mangreen Country House [wd] | Norwich | Hotel | | | |
| Manor Farm B & B [wd] | Andover | Hotel | | | |
| Manor Farm Oast [wd] | Hastings | Hotel | | | |
| Manor Hotel | | Hotel | | | blakeneymanor.co.uk |
| Manor Hotel | Stroud | Hotel | | | |
| Manor House Farmhouse | Chesterfield | Gasthaus | | | |
| Manor House Hotel | Gloucester | Hotel | | | |
| Manor House Hotel | Thrapston | Hotel | | | |
| Manor House Hotel | Torquay | Hotel | | | |
| Manor House Hotel | Worcester | Hotel | | | |
| Manor House Hotel | Pembrokeshire | Hotel | | | |
| Manor Park Hotel | Helensburgh | Hotel | | | |
| Manordaf B&B [wd] | St Clears | Hotel | | | |
| Mansfield House Hotel, 2 Mayne Road, Elgin | Elgin | Hotel | | | |
| Mansio Suites Basinghall [wd] | Leeds | Hotel | | | |
| Mansio Suites The Headrow [wd] | Leeds | Hotel | | | |
| Mansion House [wd] | Scarborough | Hotel | | | |
| Mansion House Inn | Highbridge | Gasthaus | | | |
| Maple Bank Country Guest House [wd] | Cumbria | Hotel | | | |
| Maple Court Hotel, Ness Walk, Inverness | Inverness | Landhaushotel | | | |
| Marble Arch Inn [wd] | London | Hotel | | | |
| Marcliffe Hotel and Spa [wd] | Aberdeen | Hotel | | | |
| Marina Villa Hotel | St Austell | Hotel | | | |
| Marine Hotel | Boston | Hotel | | | |
| Marine Hotel, Southerndown | Pencoed | Hotel | | | |
| Mariner's Hotel | Ilminster | Hotel | | | |
| Mariner's Inn | Norwich | Gasthaus | | | |
| Market Hotel | Hartlepool | Hotel | | | |
| Market House Inn | Exeter | Gasthaus | | | |
| Market Inn, 2 Castlehill Road, Ayr | Ayr | Gasthaus | | | |
| Market Lane Hotel | Newcastle upon Tyne | Hotel | | | |
| Market Street Hotel [wd] | Edinburgh | Hotel | | | |
| Markets Tavern Hotel | Merthyr Tydfil | Hotel | | | |
| Marlborough Hotel | Llandudno | Hotel | | | |
| Marlin Apartments Canary Wharf [wd] | Stratford | Hotel | | | |
| Marlin Waterloo [wd] | London | Hotel | | | |
| Marmion House Hotel | Kings Lynn The Red Mount | Hotel | | | |
| Marsh Farm [wd] | Highbridge | Hotel | | | |
| Marston Croft B&B [wd] | Market Harborough | Hotel | | | |
| Marton Grange Country House [wd] | Scarborough | Hotel | | | |
| Marygreen Manor [wd] | Brentwood | Hotel | | | |
| Maryville House Tearooms & Boutique B&B [wd] | Belfast | Hotel | | | |
| Mayden's Heade Hotel | Kings Lynn The Red Mount | Hotel | | | |
| ME London [wd] | London | Hotel | | | |
| Meadfoot Bay [wd] | Torquay | Hotel | | | |
| Meadowlea Guest House | Okehampton | Hotel | | | meadowleaguesthouse.co.uk |
| Melbourne Arms Inn | Northampton | Gasthaus | | | |
| Melbourne Tower Hotel And Tower Hall Hotel | Torquay | Hotel | | | |
| Meldrum Arms Hotel, South Road, Oldmeldrum | Dyce | Hotel | | | |
| Melia London Kensington [wd] | Fulham | Hotel | | | |
| Melin Pandy [wd] | St Clears | Hotel | | | |
| Melling Hall Hotel | Burton-in-Kendal | Hotel | | | |
| Merchant City Inn [wd] | Glasgow | Hotel | | | |
| Merchant House [wd] | Cornwall | Hotel | | | |
| Merchants Manor Spa [wd] | Tolvaddon | Hotel | | | |
| Mercure Bedford Centre Hotel [wd] | Bedford | Hotel | | | |
| Mercure Bristol Holland House [wd] | County of Avon | Hotel | | | |
| Mercure Exeter Southgate | Exeter | Hotel | | | |
| Mercure Hotel | Newport | Hotel | | | mercurenewport.co.uk |
| Mercure London Bridge [wd] | London | Hotel | | | |
| Mercure London Hyde Park Hotel [wd] | City of Westminster | Hotel | | | |
| Mercure Manchester Norton Grange Hotel & Spa [wd] | Rochdale | Hotel | | | |
| Mercure Newcastle George Washington Hotel Golf and Spa [wd] | Washington | Hotel | | | |
| Mercure Nottingham City Centre Hotel [wd] | Nottingham | Hotel | | | |
| Mercure Oxford Hawkwell House Hotel [wd] | Oxford | Hotel | | | |
| Mercure Shrewsbury Albrighton Hall Hotel & Spa [wd] | Shrewsbury | Hotel | | | |
| Mercure Swansea Hotel [wd] | Swansea | Hotel | | | |
| Meriden Hotel | Coventry | Hotel | | | |
| Merlin Court Hotel | Barnstaple | Hotel | | | |
| Merrimeade Hotel | Wellington | Hotel | | | |
| Merrion Hotel | Llandudno | Hotel | | | |
| Merritt House B&B [wd] | Paignton | Hotel | | | |
| Merton House [wd] | Worthing | Hotel | | | |
| Meryan House Hotel | Taunton | Hotel | | | |
| Metropole Hotel | | Hotel | 1872 | | |
| Meynell Arms Hotel | Derby | Hotel | | | |
| Mickle Trafford Manor | Chester | Landhaushotel | | | mickletraffordmanor.co.uk |
| Middle Eight [wd] | London | Hotel | | | |
| Middlewick Holiday Cottages [wd] | Glastonbury | Hotel | | | |
| Milford House Hotel | Christchurch | Hotel | | | |
| Milford House including Ormonde | Chesterfield | Hotel | | | |
| Mill Forge [wd] | Carlisle | Hotel | | | |
| Mill House Hotel | Billingshurst | Hotel | | | |
| Mill Inn, Dunnottar Avenue, Stonehaven | Aberdeen | Gasthaus | | | |
| Millgate House Hotel And Adjoining Boundary Wall | Newark-on-Trent | Hotel | | | |
| Milton House Hotel, Grange Road, Monifieth, Dundee | Dundee | Hotel | | | |
| Milton Manor Hotel | Poole | Hotel | | | |
| Milverton House Hotel | Llandudno | Hotel | | | |
| Min Y Don Hotel | Llandudno | Hotel | | | |
| Minster Walk Guesthouse [wd] | Yorkshire | Hotel | | | |
| Minster's Reach Apartments [wd] | Yorkshire | Hotel | | | |
| Mistley Thorn Hotel [wd] | Capel St. Mary | Hotel | | | |
| Modbury Inn | Plymouth | Gasthaus | | | |
| Mode [wd] | Lytham St Annes | Hotel | | | |
| Mode Hotel Lytham [wd] | Lytham St Annes | Hotel | | | |
| Montagu Place Hotel [wd] | London | Hotel | | | |
| Montcalm Royal London House-City of London [wd] | Islington | Hotel | | | |
| Montclare Hotel | Llandudno | Hotel | | | |
| Montebello | Insel Wight | Gästehaus | | | |
| Montfort Cottage Guest House [wd] | Kendal | Hotel | | | |
| Montpellier House [wd] | Milton Keynes | Hotel | | | |
| Montrose Hotel | Worcester | Hotel | | | |
| Moonraker House [wd] | Stratford-upon-Avon | Hotel | | | |
| Moor Court Farm [wd] | Hereford | Hotel | | | |
| Moor End Guest House [wd] | Durham | Hotel | | | |
| Moraydale Guest House [wd] | Elgin | Hotel | | | |
| Moreton Hotel Including Area Railings To South | Devon | Hotel | | | |
| Morley Hayes Hotel [wd] | Derby | Hotel | | | |
| Mornington Hotel London Victoria [wd] | City of Westminster | Hotel | | | |
| Morwenna Luxury Holiday Apartments [wd] | Llandudno | Hotel | | | |
| Moss Lodge [wd] | Rochdale | Hotel | | | |
| Mostyn Crescent comprising: The Marine Hotel & Nos 1-13 (Consec) including forecourt walls | Llandudno | Hotel | | | |
| Motel Air Glasgow Airport [wd] | Paisley | Hotel | | | |
| Mount Edgcombe Guest House [wd] | Torquay | Hotel | | | |
| Mount Pleasant Hotel | Exeter | Hotel | | | |