Company Index
- M and A Environmental (Northern) Ltd - Brighouse
- M G Oil - Newry
- M-I Drilling Fluids Ltd - Aberdeen
- M-O-8 Specialities - Pershore
- M-Scan Ltd - Wokingham
- M2solve Ltd - Loughborough
- Mabur Chemicals Ltd - Leeds
- MacArtney - Aberdeen
- Macaw Engineering Ltd - Wallsend
- Macbar - London
- MACC International Ltd - Ipswich
- MacDermid Autotype Ltd - Wantage
- MacDermid plc - Wigan
- Macfarlane Technology Ltd - Aberdeen
- Macher Distribution Ltd - Crawley
- Machine Condition Monitoring (MCM) Ltd - Ruthin
- Maclean Electrical
- MacLean Electrical (Projects Division) Ltd - Dingwall
- Maclin Sourcing Solutions Ltd - Bury St Edmunds
- Macron Safety Systems (UK) Ltd - Great Yarmouth
- Maelstrom Advanced Process Technologies Ltd - Glossop
- Magic Mitre Ltd - Basingstoke
- Magnet Schultz Ltd - Woking
- Magnetrol International (UK) Ltd - Burgess Hill
- Magnus Power - St Leonards on Sea
- Maher Ltd - Sheffield
- Main Chemical Co Ltd - Liversedge
- Maine Office Ltd - Kings Langley
- Maintenance Cleaning Services - Widnes
- MAK Drums and Containers - Liverpool
- Makefast Ltd - Newtown
- Malakoff and William Moore Ltd - Shetland
- Mallinckrodt Chemical Ltd - Chesterfield
- Manorforce Ltd - Brandon
- Manrochem Ltd - Huddersfield
- Manyastand - Macclesfield
- Marathon Oil UK Ltd - London
- Marine Lighting (UK) Ltd - Birmingham
- Marine Safety Engineering Company Ltd - Tamworth
- Mariner Expro - Aberdeen
- Marint (Offshore Services) Ltd - Thames Ditton
- Maris Ltd - Aberdeen
- 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 and Gas - London
- Mascall Associates Ltd
- Mast Carbon Advanced Products Ltd - Plymouth
- Mast Carbon Technology Ltd - Guildford
- Master Flo Valve Co (UK) Ltd - Aberdeen
- Matrix Chemie Ltd - Leeds
- Maurer Instruments - Uxbridge
- Maxol Direct NI Ltd - Newtownabbey
- Maxol Lubricants UK - Wednesbury
- Maxwell Drummond International - Aberdeen
- Maxwell Seals Ltd - Newcastle upon Tyne
- Maybridge - Camelford
- Mayfield Laboratory Ltd - Tiverton
- Mayoh Press Ltd - Carnforth
- MB Engineering Solutions Ltd - Motherwell
- MB Inspection - Great Yarmouth
- MBC Metal Powders plc - Birmingham
- MBI International and Partners - London
- MCC Ltd - Grantham
- Mcdonnell Coal Merchants - Fort Augustus
- McGean - Rohco (UK) Ltd - Wolverhampton
- McKenna Group - Worksop
- MCM O'Drill (UK) Ltd - Aberdeen
- McNulty Offshore Construction Ltd - South Shields
- MDC Technology Ltd - Middlesbrough
- MDS Engineering - Willenhall
- Meade-King, Robinson and Co Ltd - Liverpool
- Measurement and Control Services Ltd - Leeds
- Measurement Systems Ltd - Newbury
- MEDAC Ltd - Egham
- Medex Medical Export Co Ltd - Northampton
- Medical Pipeline Services Ltd - Stockport
- Medical Wire and Equipment Ltd - Corsham
- Medichem International - Sevenoaks
- Medlogic Global Ltd - Plymouth
- Medusa Oil and Gas Ltd - Reading
- Medway Galvanising Co Ltd - Sittingbourne
- Melaleuca Plantations Ltd - Alresford
- Melbourn Scientific Ltd - Royston
- Melford Laboratories Ltd - Ipswich
- Melrose Resources Plc - Edinburgh
- Memcor Ltd - Derby
- Mentholatum Co Ltd - East Kilbride
- Mentor International Management Consultants Ltd - Ilford
- Mercia Flexibles - Ludlow
- Merck Chemicals Ltd - Nottingham
- Mercoil Ltd - Newton Abbot
- Meridian Maritime (International) Ltd - Louth
- Merkland Tank Ltd - Glasgow
- Merlett Plastics (UK) Ltd - Yate
- Merlin Chemicals Ltd - Liphook
- Merpro Ltd - Montrose
- Mersey Bunkering - Runcorn
- Messer Nippon Sanso Ltd - Coventry
- Metal Ecosse Ltd - Aberdeen
- Metalcraft Plastic Coatings Ltd - Accrington
- Metascientific.com - Windlesham
- Metcraft Ltd - Littlehampton
- Metoc plc - Liphook
- Metrohm UK Ltd - Buckingham
- MF Manufacturing Ltd - Bristol
- MGA Coatings Ltd - Coventry
- MGA Consultancy Services Ltd - Aberdeen
- MGM Petrogas - Teignmouth
- MGM Trading Company Ltd - Burton on Trent
- MI Drilling Fluids Ltd - Aberdeen
- Miac Ltd - Wrexham
- MIB International Ltd - Coventry
- Michell Instruments Ltd - Ely
- Microchem Systems Ltd - Coventry
- Microgen Bioproducts Ltd - Camberley
- Micropack Engineering Ltd - Aberdeen
- Micropol Ltd - Stalybridge
- Middle East Chemicals Ltd - Bedford
- Midland Combustion Ltd - Wolverhampton
- Midland Cryogenics Ltd - Wolverhampton
- Midlands Mining Ltd - Newcastle
- Midnite Express International Couriers Ltd - Wythenshawe
- Miller Argent - Merthyr Tydfil
- Millipore UK (T/u Bioprocessing Ltd) - Consett
- Milton-Lloyd Holdings plc - London
- Minco UK Ltd - Stroud
- MineTech International - Mitcheldean
- Mining and Chemical Products Ltd - Wellingborough
- Minium Tool Co Ltd - Cheltenham
- Minster Fuels - Wimborne
- Minster International Business Development Ltd - Richmond on Thames
- Minton Treharne and Davies Ltd - Cardiff
- Mirage Inks Ltd - Bath
- Mitchell Cotts Chemicals Ltd - Mirfield
- Mixalloy Ltd - Deeside
- MJG-R Ltd - Evesham
- MK Inspection Services Ltd - Leighton Buzzard
- ML Laboratories plc - Liverpool
- MML McGeoch Marine Ltd - Glasgow
- Mobil North Sea Ltd - Aberdeen
- Mobil North Sea Ltd - London
- Mobil Oil Co Ltd - Milton Keynes
- Mobrey Ltd - Slough
- Molecular Products Ltd - Dunmow
- Molyslip Atlantic Ltd - Kidlington
- Monarch Chemicals Ltd - Sheerness
- Monax Glass Ltd - Cupar
- Monitor Coatings Ltd - North Shields
- Moore and Co. Construction Solicitors - Manchester
- Moorside Mining Co Ltd - Sheffield
- Morris Lubricants Ltd - Shrewsbury
- Moss Plastic Parts Ltd - Kidlington
- Motair International Pneumatics Ltd - Maldon
- Motherwell Control Systems Ltd - St Helens
- Mott MacDonald Ltd - Glasgow
- Mouldlife - Newmarket
- MP Storage and Blending Ltd - Middlesbrough
- MPB Industries Ltd - Tonbridge
- MS George Ltd - Richmond on Thames
- MSE (Consultants) Ltd - Carshalton
- MSeis - Axbridge
- MSH Chemical Manufacturing Ltd - Kingswinford
- MSI Oilfield Products - Aberdeen
- Mudpro Consultants Ltd - Great Yarmouth
- Muir Matheson Ltd - Aberdeen
- Multisol Ltd - Manchester
- Multivalve Technology Ltd (MVT) - Dunfermline
- Murphy and Son Ltd - Nottingham
- Musketeer Services Ltd - Horley
- Mustang Oil Ltd - Perth
- Mykal Industries Ltd - Wellingborough
