A.B.B.
Adtranz
Alcatel
Allenbuild plc
Alstom
AMEC plc
Ansaldo
Astaldi International Inc
B.A.A.
Babcock Borsig Service GmbH
Barnsley Metropolitan Council
Balfour Beatty plc
Bovis Lend Lease
British Waterways
Brittania Construction
Carillion plc
CISA International
Costain Group plc
Deutsche Babcock
Electricity North West
Essex County Council
Ferovial
GTRM

Halcrow
H.B.G. UK Ltd
Jarvis plc
Kemble Water Ltd
Laings
London Regional Transport Ltd
Metronet
New Schools Ltd
Network Rail
Nuclear Decommissioning Authority
Skanska Group plc
Shurgard Storage Centres UK Ltd
Siemens plc
Steeles Engineering
Surrey County Council
Taylor Woodrow plc
Thames Water Ltd
TransManche Link (TML)
Tube Lines Ltd
Volker Stevin
Westinghouse Rail Systems Ltd
West Sussex County Council