- A&P Group
- ABS Group Inc
- Advantage Bus Group
- Aker Kvaerner
- Alcan
- Alstom Power Generation Ltd
- AMEC
- Atkins Global
- Automotive Electronics Europe
- Axa
- BAE Systems
- BM Trada Certification
- BP
- British Energy
- British Telecom
- Business Link
- Carillion
- Caterpillar
- City of Sunderland
- Cleveland Bridge
- Coca-Cola
- Cova Products
- Croda Chemicals
- Crown Cork and Seal
- Crown Speciality Packaging UK
- Darlington Borough Council
- Derby City Council
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- Draka UK
- Durham County Council
- Eaga
- Easington District Council
- EDF Energy
- Enterprise
- Fina Petrol
- Folkstone and Dover Water Services
- Formica Ltd
- Gateshead MBC
- GlaxoSmithKline
- Hashimoto
- Huhtamaki Packaging Worldwide
- Icopal
- Inland Revenue
- Lafarge Plasterboard
- Leeds City Council
- Logica UK
- Merck and Co
- Metronet
- Middlesbrough Borough Council
- Millipore
- Minstry of Defence
- Napier University
- National Express
- National Power
- Nestle
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- Newcastle City Council
- Nexfor Ltd
- Nissan
- North Tees & Hartlepool NHS Trust
- Northumberland County Council
- Optos Ltd
- Parker Hannifin
- PII
- Saint-Gobain UK
- Saltwell Signs
- Sanofi Synthelabo
- SCA Packaging
- Stiller Transport
- Tanfield group
- Thorn Lighting
- Transco
- TRW Automotive Systems
- TUV
- Tyne & Wear Transport
- United Utilities
- VA Tech - Reyrolle
- Vertellus Specialities UK Ltd
- VTL Group
- West Midlands Police
- YEDL
- Yorkshire Water
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