- Alpha Construction
- Alstom Power
- AMEC
- Balfour Beatty
- BAM Nuttall
- Barr Construction
- JN Bentley
- Bilfinger & Berger
- Byrne Brothers
- Clugston Construction
- Costain
- CTS
- Dawson Construction Plant
- EDF Energy
- ERH Construction
- Farrans Construction
- Gilbert Ash
- H & J Martin
- Interserve
- ISG Interior Exterior
- Kier
- McAleer & Rushe
- McLaughlin & Harvey
- Morgan Sindall
- TRIIO
- Pochin Construction
- RWE
- John Sisk & Son Construction
- Skanska
- Trant Construction
- Uplands Retail
- Wales & West Utilities
- West Midland Gas Alliance
- Willmott Dixon Housing
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