- AON Group
- Adult Services-Kent Council
- Amicus Horizon
- Arts Council
- Associated British Ports
- Aviva Plc
- BBC
- BIFFA Waste Services
- BUPA
- Baker McKenzie LLP
- Bank of England
- Barking & Dagenham Council
- Bolton Community College
- Bouygues UK Ltd
- Bovis/Lendlease
- British Medical Association
- British Transport Police
- Buckingham Palace
- Burberrys Ltd
- CB&I UK Ltd
- Cambridgeshire Police Authority
- Camelot Group
- Camidoc/Harmoni
- Cancer Research Campaign
- Canon UK Ltd
- Capita PLC
- Carebase
- Carillion
- Citibank International Plc
- Computer Generated Solutions Inc (New York)
- EON Energy
- English Heritage
- Essex County Fire and Rescue Services
- Essex Probation Service
- Genesis Investment Management LLP
- Hackney Borough Council
- Hampshire County Council
- Hampshire PCT NHS Trust
- Haringey Council
- Harrods Limited
- Harveys Furnishing Group
- Hastings Council
- Havering Council
- Historic Royal Palaces
- Home Office
- ICSA
- Irish Embassy
- Kent Constabulary
- Kone Lifts
- Lambert Smith Hampton
- Leeds Infirmary
- Libertys
- London Borough of Barnet
- London Fire Brigade
- Lutech Resources
- Luton Borough Council
- Metropolital Police
- Ministry of Defence
- Moody’s Credit Rating Agency
- NHS Direct
- National Car Parks Ltd
- National Gallery
- New Scotland Yard
- Newham Borough Council
- Ofsted
- QVC
- Queen Mary’s Hospital
- Redbridge Borough Council
- Redbridge Health Authority
- Residential Management
- Royal Academy of the Arts
- Royal Albert Hall
- Royal Bank of Scotland
- Royal Borough of Kensington & Chelsea
- Royal British Legion
- Royal College of GP’s
- Royal College of Physicians
- Royal Household
- Royal National Theatre
- Serco
- Suffolk Constabulary
- Surrey Police
- Tate Gallery
- Taylor Wimpey
- The Princes Trust
- Tokio Marine
- Total Gas & Power
- Transport for London
- UCLH NHS Foundation Trust
- UK TV
- Unison
- University of East London
- Webfusion
- Westbury Hotel
- Wokingham District Council
- YMCA
