- Ashurst
- Astra Zeneca
- Atlas
- Bahrain Institute of Banking & Finance
- BEA Systems Limited
- BMW (UK) Limited
- Bradford & Bingley Group PLC
- British Airways PLC
- BT
- Civil Aviation Authority
- Daimler Chryslers UK Ltd
- Derbyshire County Council
- Dudley Metropolitan Borough Council
- Financial Services Authority Limited
- Fox IT Limited
- Glasgow City Council
- Inmarsat
- King's College of London
- Land Registry
- Land Rover
- Lincolnshire County Council
- Lloyds TSB Asset Finance
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- London Borough of Ealing
- London Borough of Richmond Upon Thames
- Mid Yorkshire Hospitals NHS Trust
- North Yorkshire County Council
- Norwich Union
- Nottinghamshire County Council
- Royal Borough of Kensington & Chelsea
- Saudi Arabian Airlines
- Seetec Business Technology Centre
- Solihull Metropolitan Borough Council
- South Essex Partnership Trust
- Star Technology Services
- Tack International
- The Open University
- The Queens University Belfast
- TNT (UK) Limited
- US Army
- Warwickshire County Council
- Whipps Cross University
- Wickes Building Supplies Limited
- WSP
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