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• J. B. Barry and Partners Ltd
• J S Group
• Jackson Drilling Holdings Ltd
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• James Hutton Ltd
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• JDP
• Jet Materials Ltd
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• John F Hunt Regeneration Limited
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• Jomas Associates Ltd
• Jons Civil Engineering Company Limited
• Journal of Petroleum Geology
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• University of Liverpool
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• University College London
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• Loots Groundwater International
• Lovell Johns Ltd
• Low & Bonar
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• M J Rees & Company Ltd
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• Macleod Simmonds Ltd
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• Mainland Aggregates Ltd
• The University of Manchester
• Manestream Ltd
• Manlift Hire Ltd
• Mann Isle Geoscience Ltd.
• Manning Ground Engineering
• Mannvit
• Maptek
• MarineSpace Ltd
• William J Marshall & Partners
• Martello Piling
• Marubeni Europe Plc
• Mason Evans
• Matchtech Group (UK) Ltd
• Materials Movement Ltd
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• Mattinson Partnership
• Maxwell GeoSystems Ltd
• MB Stratigraphy Limited
• McBains Limited
• McCarthy Taylor Systems Limited
• McCloskey Equipment Ltd
• McCloy Consulting Ltd
• MCL Consulting
• Meehan Drilling Ltd
• Meridian Geoscience Ltd
• Merlyn Consulting Ltd
• Merrett Survey Ltd
• Met Consultancy Group
• Meteorological Office
• Metrol Technology Group
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• Michelmores LLP
• Micon International Co Limited
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• The Mineralogical Society
• Minerex Environmental Limited
• Minerex Geophysics Limited
• Mining Journal
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• Minton Treharne & Davies Ltd
• M&J Drilling Services Ltd
• MJCA
• MM-EC Geoenvironmental
• MMT (UK) Limited
• Monmouth Scientific
• Mott MacDonald
• Moussa Direct Ltd (Moussa Minerals & Fossils)
• The MSA Group
• MT Geoservices Ltd
• Mull Geophysical Ltd
• Murphy Geospatial
• Namurian Geological Services Limited
• National Association of Mining History Organisations
• National Collection of Aerial Photography (NCAP)
• National Map Centre
• National Museum Wales
• National Sewerage Association (NSA)
• National Stone Centre
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• Naylor Industries Plc
• Neil Foundations Systems Ltd
• Neilsoft Limited
• Network Stratigraphic Consulting Ltd
• New Pig Ltd
• University of Newcastle
• NewFields UK LLC
• Newman Drilling
• Nicholas O'Dwyer
• Nicholls Boreholes
• Nicholls Colton & Partners Ltd
• North of England Institute of Mining and Mechanical Engineers
• North Ridge Pumps Ltd
• Northern Geological Supplies Limited
• Northpoint Geotechnical Limited
• University of Nottingham
• Novo Tech Software
• NUB Engineering Ltd
• Nubian Consulting Ltd
• NX Consulting
• Oakland Site Investigation
• Oasys Ltd
• Obsidian Environmental
• O'Callaghan Moran & Associates
• Oceans-ESU Ltd
• OGI Groundwater Specialists Limited
• OHES Environmental Ltd
• Ohmex Ltd
• Oilfield Production Consultants (OPC) Ltd
• Olympus
• Omega Laser Services
• Omnia
• OnSite Central Ltd
• Oolithica Geoscience Ltd
• The Open University
• Oracle Environmental Experts Limited
• OSM Environmental Consultants Ltd
• OT Drilling Ltd
• OTB Engineering
• The University of Oxford
• Oxford University Press
• P J Edwards & Co (UK) Ltd
• P J Hirons Ltd
• Padley & Venables Ltd
• PAGeotechnical Ltd
• Pangaea Integrated Reservoir Solutions Limited
• Partrac Ltd
• PB Drilling Ltd
• PCE Instruments UK Ltd
• P.D.F Limited
• Pennine Geotechnical Services Ltd
• Perega Clear Structures
• Petrolab Limited
• Petroleum Exploration Society of Great Britain
• Petroleum Geo-Services
• Petrostrat
• Phase Site Investigations Ltd
• Phlorum Limited
• Piledesigns Limited
• Pilling Geoconsultants Limited
• PJ Piling Contracts
• Platipus Anchors Limited
• Plowman Craven Ltd
• University of Plymouth
• Pore Scale Solutions Limited
• University of Portsmouth
• Powys Drilling Services Ltd
• Premier Corex
• Premier Energy Services Ltd
• Premier Plant Eng Ltd
• Priority Drilling Ltd
• Priority Geotechnical Ltd (PGL)
• Prodar Surveys
• PROKON Software Consultants
• Proquip Direct Limited
• Provectus Remediation Ltd
• PRP UK Limited
• PSA Design Ltd
• PSD (Pigott Shaft Drilling) Ltd
• PSL Professional Soils Laboratory
• QED Environmental Systems Ltd
• QME Limited
• QMJ Publishing Ltd
• QROS Limited
• Quantum Geotechnic Ltd
• R I Geotechnics Ltd
• Raeburn Drilling & Geotechnical Ltd
• Ramboll
• Ravey Consulting
• Rawcliffe Associates Ltd
• University of Reading
• Rebecca Exley Groundwater Ltd
• Red Rock Geoscience Ltd
• Redroc AB
• RedRock Associates Limited
• Redstart Northwest Limited
• REGENESIS Europe
• Regolith SI
• Reid Geophysics
• Reinforced Earth Company Ltd
• Remada Ltd
• Remediation Strategies Ltd
• Remedy Geotechnics
• Remote Aerial Surveys
• Rendel Ltd
• Resource UK
• Reynolds International Ltd
• RGS - Rogers Geotechnical Services
• Rhondda Geotechnical Services
• Richard Booth's Bookshops
• Richard Tayler Minerals
• Ridge and Partners LLP
• Rieker Inc.
• Riley Geoscience Ltd
• Risk Management Limited
• RJN Engineering Selection
• RM Frobisher (1986) Ltd
• RMA Environmental Limited
• Roberts Environmental Ltd
• Robertson Geo
• ROC Consulting
• Rock Options Ltd
• Rockbit UK Ltd
• Rockfield Software Ltd
• Rockflow Resources Ltd
• Rockmate Limited
• Rocktype Ltd
• RockWare, Inc.
• Rocscience Inc
• Roctest Ltd
• Roger Bullivant Limited (RB)
• Rolton Group
• Roskill Information Services
• Rotary Test Drilling Ltd
• The Royal Academy of Engineering
• Royal Astronomical Society
• Royal Forestry Society
• Royal Geographical Society with IBG
• Royal HaskoningDHV
• Royal Highland and Agricultural Society of Scotland
• Royal Institute of British Architects
• Royal Institution of Chartered Surveyors
• Royal Meteorological Society
• Royal Scottish Geographical Society
• Royal Society of Edinburgh
• Royal Society of Biology
• RPS Energy
• RS Hydro Ltd
• RSA Geotechnics Ltd
• RSC Mining and Mineral Exploration
• RSK Group Ltd
• Ruddlesden Geotechnical
• Rukhydro Limited
• Russell Geotechnical Innovations Limited
• S M Foster Associates Limited
• SafeLane Global
• Salop Sand & Gravel Supply Co Ltd
• Sandberg LLP
• Saxton Drilling Limited
• Scantech Geoscience
• SCGIS Ltd
• Scott Polar Research Institute
• Scottish Wildlife Trust
• Scout Recruitment
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• SDP Consulting Engineers
• Sealand Aerial Photography
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• Senceive Ltd
• Sensys GmbH
• Sequoia Environmental Ltd
• Sercel
• SERPRO
• Sevenoaks Environmental Consultancy
• SG Access Solutions Ltd
• Shadbolt Group
• ShadowAir Ltd
• University of Sheffield
• Shell UK Exploration & Production
• Shire
• Shotcrete Services
• Sidcup Lapidary & Mineral Society
• Sigicom UK
• Silkstone Environmental Limited
• Simpson Associates Consulting Engineers LLP
• The Sirius Group
• Site Analytical Group
• Site Testing Services Ltd
• Site Vision Surveys
• Sixense Limited
• SJ Geomatics Ltd
• SkyTec UAS Ireland Ltd
• SLR Consulting Ltd
• Sir Frederick Snow & Partners Ltd
• Society for Underwater Technology
• SOCOTEC UK Limited
• Soil Consultants Ltd
• Soil Engineering Geoservices Ltd
• Soil Instruments Limited
• Soil Property Testing Ltd
• Soilmec Ltd
• Soils Limited
• Soiltec Laboratories Ltd
• Solmek Ltd
• Somerset Archaeological and Natural History Society
• University of South Wales
• Southern Testing Ltd
• Specialised Geological Mapping Ltd
• Specialist Ground Engineering Ltd (SGE)
• SRK Consulting
• University of St Andrews
• Staffordshire Wildlife Trust
• Stag Geological Services Ltd
• Stanfords
• Stantec
• STM Environmental Consultants Ltd
• StrataData Ltd
• Stratasolve Ltd
• Stratum Reservoir
• Structural Soils Ltd
• Stuart Well Services
• Sub Surface Ltd
• Subscan UDS Ltd
• Subsea 7
• Subtechnics Limited
• Sumo Geophysics Ltd
• The Survey Association
• Survey Three Limited
• Sutcliffe
• Svenska Petroleum Exploration UK Ltd
• Sweco
• Swiftdale Geological Consultants
• Synergy Boreholes and Systems Ltd
• Syntillica Ltd
• TAL Construction
• Tam International North Sea Ltd
• Tarmac, a CRH Company
• Tate Exploration Consultants Ltd
• Tatra Rotalac Ltd
• Taylor & Francis Group Ltd
• Taylor Drilling Services Ltd
• TD Construction Testing Ltd
• Team UAV
• TEC
• Technics Group
• Teckna Group Ltd
• TECOP, S.A.
• Tectosat Ltd
• Telluric Land Remediation Ltd
• TenCate Geosynthetics (UK) Ltd
• Tensar International Limited
• Terradat (UK) Ltd
• Terram (Berry Global, Inc)
• TerraVisio Geosolutions (UK) Limited
• TestWells
• Texo DSI Limited
• thinkWhere
• Thomas Armstrong Group
• Thomas Telford Ltd
• Thompsons of Prudhoe Ltd
• Thomson Environmental Consultants
• Tigergeo Limited
• Titan Environmental Surveys Ltd.
• Tobin Consulting Engineers
• Tom Briody & Son
• Tony Gee and Partners LLP
• Topcon Positioning (Great Britain) Ltd
• Topdrill Ltd
• Toureen Group
• Town and Country Planning Association
• T&P Regeneration Ltd
• Trendrevel Services Ltd
• Tribal Group Plc
• Trident Hydraulics Ltd
• TRL Limited
• Troika International
• TSR Valstone Ltd
• T.T. Precision Engineering
• TT Surveys Ltd (TTS)
• Tullow Oil plc
• Turnkey Instruments Ltd
• Turnkey Regeneration
• Twickenham Surveys
• Ubique Ground Engineering Limited
• University College Cork
• University of Southampton, Ocean & Earth Science
• Urban Regen Limited
• US Radar Inc
• Van Elle Ltd
• Van Walt
• Vandenbelt Consulting
• Verde Environmental Group
• VertaseFLI Limited
• Vertical Access Ltd
• Visual Technology Services Ltd
• VJ Tech Ltd
• VolkerGround Engineering Ltd
• Wall's Well Drilling
• Ward Cole Consulting Engineers
• Wardell Armstrong LLP
• Wardrop Minerals Management Ltd
• Water Resource Associates LLP
• Waterseekers Well Drilling Services (UK) Ltd
• WB & AD Morgan Limited
• Well Drilling UK Ltd
• Wesson Environmental
• University of The West of Scotland
• Westpointe Ltd
• Westwood Global Energy Group
• Wheal Jane Laboratory
• Wheeler Site Investigation
• Whiteford Geoservices
• Whittles Publishing Limited
• Wilde Analysis Ltd
• Wiley
• Wilson Associates
• Wiltshire Geology Group
• Wincilate Ltd
• Wiser Environment
• WJ Groundwater Ltd
• WML Consulting
• Wood
• Working Smart Ltd
• Worms Eye Limited
• Wrekin Products Ltd
• Writtle College
• WSP/Parsons Brickerhoff
• X-ray Mineral Services Ltd
• YES - Your Environmental Solutions
• Your Environment Ltd
• Zenith Global Ltd
• Zetica