Company Index - M
- M A K Drums & Containers - Liverpool
- M and A Environmental (Northern) Ltd. - Brighouse
M and C Energy Group - Dunfermline- M and Co - Cobham
- M B C Metal Powders - Birmingham
- M F & T Ltd - Poole
- M F Manufacturing Ltd. - Bristol
- M I B International Ltd. - Coventry
- M S George Ltd. - Richmond
- M S I Oilfield Products - Aberdeen
- M-I Drilling Fluids Ltd - Aberdeen
- M-I Swaco - Aberdeen
- M-O-8 Specialities Ltd - Pershore
- M-Scan Ltd - Wokingham
- Mabur Chemicals Ltd. - Leeds
- MacArtney - Aberdeen
- Macbar - London
- Macc International Ltd. - Ipswich
- MacDermid Autotype Ltd - Wantage
- Macdermid Canning Ltd. - Wigan
- Macher Distribution Ltd - Lingfield
- MacLean Electrical (Projects Division) Ltd - Dingwall
- Maclin Sourcing Solutions Ltd - Bury St Edmunds
- Macron Safety Systems (UK) Ltd - Great Yarmouth
- Magnet Schultz Ltd - Woking
- Magnetrol International UK Ltd - Burgess Hill
- Magnus Power - St Leonards on Sea
- Maher Ltd - Sheffield
- Main Chemical Co. Ltd. - Heckmondwike
- Maintenance Cleaning Services - Widnes
- Makefast Ltd. - Newtown
- Malakoff and William Moore Ltd - Shetland
- Mallinckrodt Chemical Holdings (U.K.) Ltd - Chesterfield
- Manrochem Ltd - Huddersfield
- Marathon Oil Exploration (U K ) Ltd. - London
- Marine Lighting (U K) Ltd. - Birmingham
- Mariner Expro - Aberdeen
- Marint (Offshore Services) Ltd - Thames Ditton
- Maritime Consulting Associates Ltd - Lowestoft
- Marlow Ropes Ltd - Hailsham
- Marpex Chemicals Ltd. - Sutton
- Marquis and Lord - Stratford upon Avon
- Martin Grant Homes Ltd. - Dorking
- Marubeni Oil & Gas (U K ) Ltd. - London
- Masslo Co Ltd - Borehamwood
- Mast Carbon Technology Ltd - Guildford
- Master Flo Valve Co. (Uk) Ltd. - Aberdeen
- Matrix Chemie Ltd - Leeds
- Maurer Instruments - Uxbridge
- Maxol Direct (N I) Ltd. - Newtownabbey
- Maxwell Drummond International Ltd. - Aberdeen
- Maxwell Seals Ltd - Newcastle upon Tyne
- Maybridge Ltd. - Tintagel
- Mayfield Laboratory Ltd - Tiverton
- Mayoh Press Ltd. - Carnforth
- MB Inspection - Great Yarmouth
- McKenna Group - Worksop
- MCM O'Drill (UK) Ltd - Aberdeen
- McNulty Offshore Ltd - South Shields
- Mdc Technology Ltd. - Middlesbrough
- Meade-King Robinson & Co. Ltd. - Liverpool
- Measurement Systems Ltd - Newbury
- MEDAC Ltd - Woking
- Medical Export Co. Ltd. - Northampton
- Medical Pipeline Services Ltd. - Stockport
- Medical Wire & Equipment Co. (Bath) Ltd. - Corsham
- Medichem International - Sevenoaks
- Medlogic Global Ltd - Plymouth
- Melbourn Scientific Ltd. - Royston
- Melford Laboratories Ltd. - Ipswich
- Melrose Resources Plc - Edinburgh
- Mercia Flexibles - Ludlow
- Merck Chemicals Ltd - Nottingham
- Meridian Maritime International Ltd. - Louth
- Merkland Tank Ltd - Glasgow
- Merlett Plastics (UK) Ltd - Yate
- Merpro Group Ltd. - Montrose
- Mersey Bunkering Ltd - Runcorn
- Metalcraft Plastic Coatings Ltd - Accrington
- MetalEcosse Ltd - St Andrews
- Metascientific com - Sandy
- Metcraft Ltd - Littlehampton
- Metoc Ltd. - Farnham
- Metrohm U K Ltd. - Runcorn
- METTLER TOLEDO - Leicester
- MGA Consultancy Services Ltd - Aberdeen
- MHG Heating Ltd - Tadworth
- Miac Ltd. - Wrexham
- Michael S Souch - Witney
- Micropack Engineering Ltd - Aberdeen
- Micropol Ltd. - Stalybridge
- Middle East Chemicals Ltd - Bedford
- Midland Combustion Ltd - Wolverhampton
- Midland Cryogenics Ltd - Wolverhampton
- Midnite Express - Manchester
- Miller Argent (South Wales) Ltd - Merthyr Tydfil
- Millers Oils Ltd - Brighouse
- Millipore UK (T/u Bioprocessing Ltd) - Consett
- Milton Lloyd Ltd. - London
- Minco UK Ltd - Reading
- Minetech International Ltd. - Mitcheldean
- Mining & Chemical Products Ltd. - Wellingborough
- Minster International Business Development Ltd - Richmond on Thames
- Minton Treharne & Davies Ltd - Cardiff
- Mistras Group - Cambridge
- Mitchell Cotts Chemicals Ltd - Mirfield
- MJG-R Ltd - Evesham
- Mobil North Sea Llc - Aberdeen
- Mobil North Sea Ltd - London
- Molecular Products Group Plc - Dunmow
- Molyslip Atlantic Ltd. - Kidlington
- Monarch Chemicals Ltd. - Sheerness
- Monax Glass Ltd. - Cupar
- Moorside Mining Co. Ltd. - Sheffield
- Morris Lubricants Ltd - Shrewsbury
- Mott MacDonald Ltd - Glasgow
- Mouldlife Ltd. - Newmarket
- MP Storage and Blending Ltd - Middlesbrough
- MSE (Consultants) Ltd - Leatherhead
- Mseis Ltd. - Axbridge
- Msh Chemical Manufacturing Ltd. - Brierley Hill
- MSI Quality Forgings Ltd - Doncaster
- Mudpro Consultants Ltd. - Great Yarmouth
- Muir Matheson Overseas Ltd. - Aberdeen
- Mulmar Group Ltd. - Hatfield
- Multigas Installations Ltd - Manningtree
- Multisol Ltd - Manchester
- Murphy & Son Ltd. - Nottingham
- Mustang Oil Ltd. - Crieff
- Mykal Industries Ltd - Wellingborough