| Advance Environmental | FM Conway | PDE Consulting |
| Aggregate Industries | Forterra | Pick Everard |
| Anglian Water | Grundon Waste Management | Provectus |
| Ashby & Croft | Hanson Aggregates | Quarryplan |
| Baileygomm | Hinton Cook Architects | Racing Point F1 |
| Breedon Group | Ilke Homes | Rank Group |
| Brett Aggregates | J Coffey Construction | Roger Coy Partnership |
| CEMEX UK | J&J Franks | S Walsh & Sons |
| Clive Graham Associates | Kettering Borough Council | Sharba Homes |
| Daventry District Council | Kier | Simply Waste Solutions |
| Day Group | Land Logical | Space & Place (AFLS&P) |
| Deltic Group | London Borough of Hounslow | SRC Aggregates |
| Earthline | MC Cullimore | Summerleaze |
| Ede Homes | Midland Quarry Products | Tarmac |
| Elliott UK | Milton Keynes Council | TSH Architects |
| Eurovia UK | Northamptonshire County Council | WFC Contractors |
| Feltham Construction | Oikos | Wienerberger UK |

