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
CNP
Costain Group plc
Deutsche Babcock
Essex County Council
Ferovial

GTRM
Halcrow
H.B.G. UK Ltd
Jarvis plc
Kemble Water Ltd
Laings
London Regional Transport Ltd
Metronet
Network Rail
Renew Holdings plc
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