| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Curtin Watson International Limited | 02126204 | 05/12/1992 | Dissolved |
| Environment Management Limited | 02492668 | 17/04/1992 | Dissolved |
| Environmental Management Ltd | 02191084 | 30/09/1992 | Dissolved |
| Environmental Management Services Ltd. | 02201790 | 02/08/1991 | Dissolved |
| The Centre for Environmental Management Limited | 02492670 | 17/04/1992 | Dissolved |
| Watson Hawksley Ltd | 01967980 | 02/08/1991 | Dissolved |
| Watson Hawksley Quantity Surveying Ltd | 02008566 | 02/08/1994 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Conservation Technologies Ltd | 02201788 | 02/08/1991 | 09/05/1995 | Dissolved |
| Land Restoration Systems (U K) Ltd | 02492677 | 31/03/1991 | 19/01/1995 | Dissolved |
| Montgomery Watson Projects Ltd | 02339158 | 06/08/1992 | 01/12/1994 | Dissolved |
| STANTEC EUROPE LIMITED | 02438136 | 31/10/1991 | 11/08/1994 | Gold |
| STANTEC UK LIMITED | 01188070 | 28/12/1991 | 12/05/1995 | Gold |
| Watson Desmonde Ltd | 02201789 | 02/08/1991 | 18/11/1992 | Dissolved |