| Metro Convenience Limited T/A Metro Express | Hounslow | A rating |
| Metro Corner News Ltd | Liverpool | A rating |
| Metro Diner Limited T/A The Burrito | Southend-On-Sea | A rating |
| Metro Dynamics Limited | London | A rating |
| Metro Food and Wine | Harrow | A rating |
| METRO FOOD LTD | London | A rating |
| Metro Homecare Ltd | London | A rating |
| Metro Kitchens and Bedrooms Ltd | London | A rating |
| Metro Mart Retail Ltd | London | A rating |
| Metro Mini Mart | Birmingham | A rating |
| METRO PAY LESS LTD | LONDON | A rating |
| Metro Pharmacy Limited | Borehamwood | A rating |
| Metro Store (Premier) | ROTHERHAM | A rating |
| METRO STORES RETAIL LTD | Coventry | A rating |
| Metro Three Ltd T/A Metro Store | Carluke | A rating |
| Metro Trends Ltd T/As Metro News | LONDON | A rating |
| METROCART UK LTD | West Midlands | A rating |
| Metrofox Studios Limited | London | A rating |
| Metrol Technology Ltd | Aberdeen | A rating |
| MetroLaw Solicitors Limited | Goodmayes | A rating |
| METROLETTS LIMITED | London | A rating |
| Metroline Travel Limited | London | A rating |
| Metrology & Quality Services Ltd | Coventry | A rating |
| Metrolux Chauffeurs Limited | Feltham | A rating |
| Metroman Limited | London | A rating |
| METRON ENERGY APPLICATIONS S.A. | Immingham | A rating |
| Metron Group Ltd | Inverurie | A rating |
| Metronix Limited t/a The Exchange and Hop and Anchor | Aberdeenshire | A rating |
| Metronome Capital LLP | London | A rating |
| Metropolis Hairdressing Ltd | Kingston upon Thames | A rating |
| Metropolis International Group Ltd | London | A rating |
| METROPOLITAN ACCOUNTANTS LTD | HARROW | A rating |
| Metropolitan Housing Trust Ltd | London | A rating |
| Metropolitan Police Service | London | A rating |
| METROPOLITAN SECURITY SERVICES LTD | London | A rating |
| Metropolitan Tabernacle | London | A rating |
| Metropolitan Workshop LLP | London | A rating |
| Metropress Limited t/a Auction Technology Group | London | A rating |
| Metrotrade Limited | London | A rating |
| Metsa Wood UK Limited | Boston | A rating |
| Metsims Limited | Oxford | A rating |
| Metso UK Limited | Birmingham | A rating |
| MetSwift Services Ltd | Leeds | A rating |
| Mett Build Ltd | Plymouth | A rating |
| Metta Accountants Limited | Harrow | A rating |
| METTLE & BOND CARE LTD. | Oxted | A rating |
| Mettle Studio Limited | Northampton | A rating |
| Mettler Toledo Safeline X-ray Limited | Royston | A rating |
| Mettler-Toledo Ltd | Leicester | A rating |
| Mettler-Toledo Safeline Limited | Salford | A rating |
| MetUp Limited | Oxford | A rating |
| METYIS UK LTD | London | A rating |
| MEV ACCESSORIES LTD | Burton on Trent | A rating |
| MEVA FORMWORK SYSTEMS LIMITED | Tamworth | A rating |
| Mevalco (Fine Food from Spain) Ltd | Bristol | A rating |
| Mevan Restaurant | Leighton Buzzard | A rating |
| Mewar Haveli Northampton Ltd | Northampton | A rating |
| MEWBURN ELLIS LLP | MANCHESTER | A rating |
| Mews Systems Limited | London | A rating |
| MEXBOROUGH PRACTICE LIMITED | Slough | A rating |
| MEXE NW LTD | Manchester, Lancashire | A rating |
| Mexem Financial Services UK Limited | London | A rating |
| MEXI TACO LTD | LONDON | A rating |
| Mexican Grill Ltd T/A Tortilla | London | A rating |
| MEXICAN MAMA LTD | LONDON | A rating |
| Mexichem Speciality Compounds Limited | Melton Mowbray | A rating |
| Mexichem Specialty Compounds Limited | Melton Mowbray | A rating |
| MEXICHEM UK LIMITED (t/a Koura) | Cheshire | A rating |
| MEXITALY GROUP LONDON LTD | London | A rating |
| Mextemps Ltd | Middlesex | A rating |
| Meyer Office Solutions Limited | London | A rating |
| Meyn Poultry Equipment Limited | Basingstoke | A rating |
| MEYRA HOLDINGS LIMITED | Dunstable | A rating |
| Meyrick Estate Management Ltd | Bodorgan | A rating |
| MEZ CONSTRUCTION (UK) LTD | Pinner | A rating |
| MEZ CONSTRUCTION SOUTH DIVISION LTD | Harrow | A rating |
| MEZ ENTERPRISES LTD | Wales | A rating |
| MEZAN SERVICES LTD | Edinburgh | A rating |
| Mezcalito Chelsea | London | A rating |
| Meze Meze Ltd T/A Meze Meze | Edinburgh | A rating |
| Mezo Burton Limited t/a Bluebird Care (Oxford, South Oxfordshire & West Oxfordshire) | Oxford | A rating |
| MEZUNDA LTD | London | A rating |
| MEZZA HOUSE | HIGH WYCOMBE | A rating |
| Mezze at the Green Dragon | Bristol | A rating |
| MEZZE ME UK LTD | ABERGAVENNY | A rating |
| Mezzino Limited | Farnsfield | A rating |
| Mezzle Limited | London | A rating |
| Mezzle Limited | Birmingham | A rating |
| MF Accountants & Bookkeepers Limited | Essex | A rating |
| MF Accounting & Taxation Limited | Waltham Abbey | A rating |
| MF architecture | Liverpool | A rating |
| MF Business Limited | Codsall | A rating |
| MF Care and Housing Recruitment Limited | Bexley | A rating |
| MF CARE GROUP LIMITED | Warsop | A rating |
| MF Healthcare Limited | Wisbech | A rating |
| MF Sweden Limited | Warwick | A rating |
| MF Telecom Services Limited | Kent | A rating |
| MFA CONTRACT SERVICES LTD | London | A rating |
| Mfak Management Ltd | Alfreton | A rating |
| MFB PARTNERS LTD | Essex | A rating |
| MFB Solicitors Limited | London | A rating |
| MFD Communication Infrastructure Limited | Southampton | A rating |
| MFE Advertising UK | London | A rating |
| MFF Contracts | Armagh | A rating |
| MFG Exotic Ltd | Birmingham | A rating |
| MFG HIGHAMS LODGE | London | A rating |
| MFG TON PENTRE SEERVICE STATION | RHONDDA | A rating |
| MFI Motor Company Limited | Mitcham | A rating |
| MFK ACCOUNTANTS LTD | LONDON | A rating |
| MFM Investment Ltd | London | A rating |
| Mfowmy Limited T/A Royal Chef | East Ham | A rating |
| MFS International (UK) Ltd | London | A rating |
| MFS SEAFOODS LIMITED | WALSALL | A rating |
| MFUK DESIGN AND FURNITURE LTD | London | A rating |
| MFV Antares Ltd | Newry | A rating |
| MFV EMERALD DAWN LTD | TARBERT | A rating |
| MFV Strathmore Ltd | Newry | A rating |
| MFZ FOOD LTD | WREXHAM | A rating |
| MG Financial Services (PVT) Ltd | Sutton | A rating |
| MG Aluminium Solutions Limited | Lye, Stourbridge | A rating |
| MG BAZAAR LTD T/A Mass and Grocery Bazaar | Walsall | A rating |
| MG COFFEE LIMITED | London | A rating |
| MG Construction Services Ltd | Earith | A rating |
| MG Group (Professional Services) Ltd | Harrow | A rating |
| MG Legal Solicitors Limited | Preston | A rating |
| MG MAGNA WHOLESALE AND RETAIL LIMITED | Wigston | A rating |
| MG Motor UK Ltd | Birmingham | A rating |
| MG(CHESHIRE) UK LTD | Macclesfield | A rating |
| MGA EXPRESS LTD | Newport | A rating |
| MGA GARAGE SERVICES LIMITED | southampton | A rating |
| MGAC LLP | London | A rating |
| MGB Construction Services Ltd | Chigwell | A rating |
| MGB Direct Services Limited | Harrow | A rating |
| MGB Traders Limited | Manchester | A rating |
| MGBC Ltd | Luton | A rating |
| MGBCare Services ltd | Nottingham | A rating |
| MGC Pharma (UK) Ltd | London | A rating |
| Mgees Store | Edinburgh | A rating |
| MGH 4U Limited | London | A rating |
| MGH Baber Limited | Nantwich | A rating |
| MGH Technology Solutions Ltd | Cobham | A rating |
| MGI Midgley Snelling LLP | Weybridge | A rating |
| MGK BUILDERS LTD | Glasgow | A rating |
| MGK Seaview LTD | Chelmsford | A rating |
| MGL Healthcare Limited | Maidstone | A rating |
| MGM & CO. LIMITED | Dewsbury | A rating |
| MGM BUILDING CONTRACTING UK LIMITED | Orpington | A rating |
| MGM FOOD STORE LTD | Manchester | A rating |
| MGM HEALTHCARE GROUP LTD | Dewsbury | A rating |
| MGM Hospitality Services Limited T/A Dos Amigos | Aberdeen | A rating |
| MGM Retail Limited | Leicester | A rating |
| MGM UK ENTERPRISES LTD | Ilford | A rating |
| MGMT Construction Limited | Macclesfield | A rating |
| MGMT-ETC (UNITED KINGDOM) LTD | London | A rating |
| MGR Foamtex Ltd | Thame | A rating |
| MGR NE LIMITED | Newcastle Upon Tyne | A rating |
| MGRWK Business Support Services Ltd | London | A rating |
| MGS Design Limited | Maidenhead | A rating |
| MGS TECHNOLOGIES LIMITED | Surbiton | A rating |
| MGS27 Limited | London | A rating |
| MGT FOODS UK LTD | EDINBURGH | A rating |
| MGT HEALTH CARE LIMITED | CAMBRIDGE | A rating |
| MGY Management Services Limited | London | A rating |
| MH (GB) Ltd | Stevenage | A rating |
| MH ACCOUNTANT LTD | Manchester | A rating |
| MH Barristers | London | A rating |
| MH BOLTON LTD | Bolton | A rating |
| MH Foundation | Corby | A rating |
| MH Integrated Solutions ltd | Leicester | A rating |
| MH Merchant Limited | LONDON | A rating |
| MH Motors Ltd | Newtownabbey | A rating |
| MH ONLINE LTD | HUDDERSFIELD | A rating |
| MH Private Wealth Ltd | Twickenham | A rating |
| MH Quality Care Limited | BIRMINGHAM | A rating |
| MH RECRUITMENT LIMITED | Staines | A rating |
| MH RX Limited | Isleworth | A rating |
| MH Solicitors LLP | STOKE ON TRENT | A rating |
| MH STAR TRADING LTD | Glasgow | A rating |
| MH Star UK Ltd. | Northamptonshire | A rating |
| MH Surveys Limited | Sheldon | A rating |
| MH UK MOTORS LTD | Stanford-le-Hope | A rating |
| MH1 CONSTRUCTION LIMITED | Ilford | A rating |
| MHA | Derby | A rating |
| MHA Advisory Limited | Milton Keynes | A rating |
| MHA Audit Services LLP | Milton Keynes | A rating |
| MHA Carpenter Box | Worthing | A rating |
| MHA FITTINGS LTD | Leicester | A rating |
| MHA Global LTD | SANDY | A rating |
| MHA LONDON OFFICE LTD | London | A rating |
| MHA Service Ltd | Milton Keynes | A rating |
| MHA Structural Design | London | A rating |
| MHAB MULTI BUSINESS LIMITED | LONDON | A rating |
| MHB Consultants | Glasgow | A rating |
| MHBT Limited | Huddersfield | A rating |
| MHC AND CO LTD | Bristol | A rating |
| MHC Manchester Ltd t/a My Homecare | Culcheth | A rating |
| MHD Global Limited | Bradford | A rating |
| MHD Ltd T/A Mama Shelter | London | A rating |
| MHG Enterprises ltd | Lincoln | A rating |
| MHH Security Ltd | Birmingham | A rating |