| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Exeter Energy Ltd | 02836056 | 03/06/1997 | Dissolved |
| Green Gas Power Ltd | 03106018 | 03/06/1997 | Dissolved |
| OCTAGON (CBM) LIMITED | 02292431 | 30/07/1997 | Dissolved |
| OCTAGON (CBM) RESOURCES LIMITED | 02757863 | 02/10/1998 | Dissolved |
| OCTAGON ENERGY LIMITED | 02020195 | 30/07/1997 | Dissolved |
| OCTAGON ENERGY LIMITED | 02020195 | 19/10/1998 | Dissolved |
| Pydale Ltd | 03170530 | 13/03/1996 | Dissolved |
| Pydale Ltd | 03170530 | 13/03/1996 | Dissolved |
| Topham Consultancy Services Ltd | 01912668 | 11/11/2008 | Dissolved |
| Topham Consultancy Services Ltd | 01912668 | 31/12/1991 | Dissolved |
| Worley Engineers Ltd | 03233831 | 05/08/1996 | Dissolved |
| Worley Engineers Ltd | 03233831 | 05/08/1996 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| HALYARDS (TOPSHAM) MANAGEMENT LIMITED | 02253289 | 10/11/1992 | 01/11/2019 | Gold |
| Robertsons Marina & Boatyard Ltd | 03354145 | 17/04/1997 | 20/10/1999 | Dissolved |
| Robertsons Marina & Boatyard Ltd | 03354145 | 17/04/1997 | 20/10/1999 | Dissolved |