Company Index
- M & A Environmental (Northern) Ltd. - Brighouse
- M A K Drums & Containers - Liverpool
- 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-o-8 Specialities Ltd. - Pershore
- M-Scan Ltd - Wokingham
- M2SOLVE Ltd. - Loughborough
- Mabur Chemicals Ltd. - Leeds
- MacArtney - Aberdeen
- Macbar - London
- Macc International Ltd. - Ipswich
- MacDermid Autotype Ltd - Wantage
- Macdermid Canning Ltd. - Wigan
- Macher Distribution Ltd - Crawley
- Machine Condition Monitoring (McM) Ltd. - Ruthin
- Maclean Electrical - Liverpool
- MacLean Electrical (Projects Division) Ltd - Dingwall
- Maclin Sourcing Solutions Ltd - Bury St Edmunds
- Macron Safety Systems (UK) Ltd - Great Yarmouth
- Magic Mitre Ltd. - Basingstoke
- Magnet Schultz Ltd - Woking
- Magnetrol International U K 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
- Manorforce Ltd. - Brandon
- Manrochem Ltd - Huddersfield
- Marathon Oil Exploration (U K ) Ltd. - London
- Marine Lighting (U K) Ltd. - Birmingham
- Marine Safety Engineering Company Ltd - Tamworth
- Mariner Expro - Aberdeen
- Marint (Offshore Services) Ltd - Thames Ditton
- Maritime Consulting Associates Ltd - Lowestoft
- Marling Leek Ltd - Leek
- Marlow Ropes Ltd - Hailsham
- Marpex Chemicals Ltd. - Sutton
- Marquis and Lord - Stratford upon Avon
- Marshalsea Hydraulics Ltd. - Taunton
- Martin Grant Homes Ltd. - Dorking
- Marubeni Oil & Gas (U K ) Ltd. - London
- Mascall Associates Ltd - Dunoon
- Mast Carbon Technology Ltd - Guildford
- Master Flo Valve Co. (Uk) Ltd. - Aberdeen
- Mathers Foundry - Westley Group Ltd - Manchester
- 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 & Control Services Ltd. - Leeds
- Measurement Systems Ltd - Newbury
- MEDAC Ltd - Egham
- Medical Export Co Ltd trading as Medex - Northampton
- Medical Pipeline Services Ltd. - Stockport
- Medical Wire and Equipment Co (Bath) Ltd - Corsham
- Medichem International - Sevenoaks
- Medlogic Global Ltd - Plymouth
- Medusa Petroleum Ltd. - Reading
- Medway Galvanising Co. Ltd. - Sittingbourne
- Medway Optics Ltd - Rainham
- Melbourn Scientific Ltd. - Royston
- Melford Laboratories Ltd. - Ipswich
- Melrose Resources Plc - Edinburgh
- Memcor Ltd. - Derby
- Mercia Flexibles - Ludlow
- Merck Chemicals Ltd - Nottingham
- Meridian Maritime International Ltd. - Louth
- Merkland Tank Ltd - Glasgow
- Merlett Plastics (UK) Ltd - Yate
- Merlin Chemicals Ltd - Liphook
- Merpro Group Ltd. - Montrose
- Mersey Bunkering Ltd - Runcorn
- Metal Ecosse Ltd - Aberdeen
- Metalcraft Plastic Coatings Ltd. - Accrington
- Metascientific.com - Windlesham
- Metcraft Ltd - Littlehampton
- Metoc plc - Liphook
- Metrohm U K Ltd. - Buckingham
- METTLER TOLEDO - Leicester
- MGA Coatings Ltd - Coventry
- MGA Consultancy Services Ltd - Aberdeen
- MHG Heating Ltd - Tadworth
- MI Drilling Fluids Ltd - Aberdeen
- Miac Ltd. - Wrexham
- Michael S Souch - Witney
- Michell Instruments Ltd - Ely
- Microgen Bioproducts Ltd. - Camberley
- 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
- 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
- Mirage Inks Ltd. - Bath
- Mitchell Cotts Chemicals Ltd - Mirfield
- MJG-R Ltd - Evesham
- MML McGeoch Marine Ltd - Glasgow
- Mobil North Sea Ltd - Aberdeen
- Mobil North Sea Ltd - London
- Mobrey Ltd - Slough
- Molecular Products Group Plc - Dunmow
- Molyslip Atlantic Ltd. - Kidlington
- Monarch Chemicals Ltd. - Sheerness
- Monax Glass Ltd. - Cupar
- Monitor Coatings Ltd. - North Shields
- 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
- Mudpro Consultants Ltd - Great Yarmouth
- Muir Matheson Ltd - Aberdeen
- Multigas Installations Ltd - Manningtree
- Multisol Ltd - Manchester
- Murphy & Son Ltd. - Nottingham
- Musketeer Services Ltd - Horley
- Mustang Oil Ltd. - Crieff
- Mykal Industries Ltd - Wellingborough
