| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Kennedy & Donkin Building Services Ltd | 02060238 | 13/10/2003 | Dissolved |
| Kennedy & Donkin Systems Control Ltd | 01578139 | 13/10/2003 | Dissolved |
| Kennedy & Donkin Trustees Ltd | 02336148 | 13/10/2003 | Dissolved |
| Maunsell Parsons Brinckerhoff Ltd | 02232027 | 10/11/2003 | Dissolved |
| Merz & McLellan Properties Ltd | 00123950 | 09/03/1999 | Dissolved |
| Merz Orchard Ltd | 00707372 | 18/07/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BLAKE NEWPORT ASSOCIATES LIMITED | 02654984 | 29/05/2012 | 07/12/2018 | Bronze |
| KENNEDY & DONKIN GENERATION & INDUSTRIAL LIMITED | 02060259 | 13/10/2003 | 14/08/2006 | Dissolved |
| KENNEDY & DONKIN LIMITED | 04103325 | 13/10/2003 | 14/08/2006 | Dissolved |
| KENNEDY & DONKIN POWER LIMITED | 01473204 | 13/10/2003 | 14/08/2006 | Dissolved |
| Kennedy & Donkin Overseas Ltd | 02058508 | 13/10/2003 | 14/08/2006 | Dissolved |
| MERZ AND MCLELLAN CONSULTING ENGINEERS LIMITED | 03246982 | 18/07/2000 | 12/05/2004 | Dissolved |
| MERZ AND MCLELLAN LIMITED | 03627022 | 18/07/2000 | 14/08/2006 | Dissolved |
| PARSONS BRINCKERHOFF LTD | 02554514 | 14/02/2000 | 14/08/2006 | Bronze |
| PB POWER LTD | 04353230 | 22/05/2003 | 12/05/2004 | Dissolved |
| Pb Power Holdings Ltd | 02560063 | 24/04/2001 | 12/05/2004 | Dissolved |
| RUST CONSULTING LIMITED | 02778272 | 13/10/2003 | 14/08/2006 | Dissolved |