| Contributing firm | Author(s) |
| England | |
| King & Wood Mallesons | Angus Evers |
| Costain Group plc | Martin Hopkins |
| Ecolateral | Peter Jones |
| Ricardo-AEA | Adam Read |
| Anastasia Sousanoglou | |
| Faisal Qayium | |
| Mark Ramsay | |
| Tamar Energy Ltd | Dan Poulson |
| Terence O'Rourke Ltd | Steve Molnar |
| Vismundi Ltd | Keith Riley |
| Waste Transition Ltd | Paul Levett |
| Westminster City Council | Jarno Stet |
| WYG | Nigel Mattravers |
| Wales | |
| Ricardo-AEA | Kathryn Warren |



