| 4-Rail |
| Absolute Photography Ltd |
| Acrow Global ltd |
| AEG Power Solutions Ltd |
| Airedale Internat'l Air C |
| Anord Mardix (UK) Ltd |
| Approved Inspector Service |
| Ashtead Plant Hire Company Ltd |
| ATG Access Ltd |
| Blu 3 (UK) Ltd |
| Bon Appetit Group Ltd |
| Booth Industries Ltd |
| Brentwood Communications Ltd |
| Brocks Haulage Ltd |
| Bureau Veritas UK Ltd |
| CBL Ltd |
| CCS Scaffolding Ltd |
| CHC Systems Ltd |
| CK Tech Ltd |
| Complete Mechanical Services Co Ltd |
| Conemasters Ltd |
| Construction Industry Solution |
| Costain Skanska Joint Venture |
| Cousins Ltd |
| Danny Sullivan Ltd |
| Delatim Ltd |
| Delmatic Ltd |
| Designed Architectural Ltd |
| DMC Contracts Ltd |
| Duradiamond Healthcare Ltd |
| Electracom Projects (UK) Ltd |
| Embrace Media Ltd |
| Emico Ltd |
| Engie Services Ltd |
| Euroflo Group Ltd |
| Fire Protection Ltd |
| Flakt Woods Ltd |
| Flood Control International |
| Floods Flooring Ltd |
| G.B.Access Ltd (Now Ashstead Plant Hire Co Ltd) |
| Gane International Ltd |
| GB Electronics Ltd |
| Geotechnical Observations |
| Geothermal International |
| Getec (Keller Ltd) |
| Guardian Lightning Protection |
| H & M Security Services Ltd |
| High Value System Engineering |
| Honeywell Control Systems Ltd |
| Howe Green Ltd |
| Ingram Consultancy |
| James & Son Ltd |
| James Fisher Testing Service |
| Jewers Doors Ltd |
| JJ Sweeney Ltd |
| Joseph Gallagher Ltd |
| JSNC |
| Kelly Formwork (UK) Ltd |
| Kilnbridge Construction Services Ltd |
| Kingdom Services Group Ltd (formerly Rehene Multiservice) |
| Kone PLC |
| Kwik Klik Hoardings |
| Lee Warren Fabrication & Design Ltd |
| Lindner Group |
| LMOB Electrical Contractors |
| Mabey Bridge Ltd |
| May Harris Multi Service |
| McNealy Brown Ltd |
| Metric Office Furniture Ltd |
| Mitie Pest Control Ltd |
| Mitie Technical Facilities Management Limited |
| MMV Contracting Ltd |
| Molegrove |
| Oakchase Design Ltd trading as CAD Services |
| Omega Red Group Ltd |
| O'Rourke Contracting plc |
| Orton Lifts & Escalators Ltd |
| Otis Ltd |
| Ove Arup |
| PFP Contracting Ltd |
| PHD Hoists & Masts Ltd |
| Press-On Digital Imaging |
| Price Building Services Ltd |
| Pyramid Builders Ltd |
| Reach Active Ltd |
| Rehene Multiservice Ltd (Now Kingdom Services Group Ltd) |
| Rentokil Initial Services |
| Riglift (UK) Ltd |
| Robore Cuts Ltd |
| Rostek UK Ltd |
| SAS International Ltd |
| Shotcrete Services Ltd |
| Skanska Technology Ltd |
| Sorba UK Ltd |
| Specialist Plant Associates Ltd |
| SPL Installations |
| SRL Technical Services Ltd |
| Stainless Metalcraft (Chatteris) Ltd |
| Steelway Fensecure Ltd |
| Subtechnic Ltd |
| Systech Ltd |
| TCS Screeding |
| Terminex UK Ltd |
| Testconsult Harlow Ltd |
| Tew Plus Ltd |
| Thameside Fire Protection |
| Treebox Ltd |
| Trox UK Ltd |
| UK Flood Barriers Ltd |
| Universal Builders Supply |
| VG Clements Contractors Ltd |
| VVB Engineering |
| Waco B.V |
| WaterSeal |
| Wood & Wood International Signs Ltd |
| Woodland Site Services |
| WSP Environmental Ltd |
| York EMC Services (2007) |
