| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AYR ENVIRONMENTAL SERVICES LIMITED | SC198368 | 28/10/1999 | 01/10/2010 | Bronze |
| AYR ENVIRONMENTAL SERVICES OPERATIONS LIMITED | SC201810 | 07/12/1999 | 03/04/2008 | One Red Flag |
| CALEDONIAN ENVIRONMENTAL LEVENMOUTH TREATMENT SERVICES LIMITED | 03991397 | 12/05/2000 | 03/04/2008 | Gold |
| CALEDONIAN ENVIRONMENTAL SERVICES HOLDINGS LIMITED | 03936960 | 01/03/2000 | 01/10/2010 | Silver |
| CALEDONIAN ENVIRONMENTAL SERVICES PLC | SC156608 | 23/07/1999 | 01/10/2010 | Silver |
| GOSFORTH RECREATION COMPANY LIMITED(THE) | 00067073 | 13/04/2019 | 31/10/2020 | Bronze |
| NORTHUMBRIAN WATER PROJECTS LIMITED | 02528704 | 01/06/1999 | 01/10/2010 | Silver |
| WASTEWATER MANAGEMENT HOLDINGS LIMITED | SC201429 | 24/11/1999 | 01/10/2010 | Bronze |