| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Geowarmth Ltd | 04940763 | 29/10/2004 | Dissolved |
| Geowarmth Ltd | 04940763 | 21/03/2007 | Dissolved |
| Goodtech Uk Ltd | 04391271 | 17/07/2003 | Dissolved |
| Whitewater Systems Ltd | 04853791 | 18/09/2003 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALMOND ENGINEERING LIMITED | SC240749 | 03/04/2008 | 15/11/2022 | Silver |
| AYR ENVIRONMENTAL SERVICES LIMITED | SC198368 | 16/08/2000 | 03/04/2008 | Bronze |
| AYR ENVIRONMENTAL SERVICES OPERATIONS LIMITED | SC201810 | 07/12/1999 | 21/11/2005 | One Red Flag |
| CALEDONIAN ENVIRONMENTAL LEVENMOUTH TREATMENT SERVICES LIMITED | 03991397 | 24/10/2000 | 21/11/2005 | Gold |
| CALEDONIAN ENVIRONMENTAL SERVICES HOLDINGS LIMITED | 03936960 | 16/08/2000 | 03/04/2008 | Silver |
| CALEDONIAN ENVIRONMENTAL SERVICES PLC | SC156608 | 16/08/2000 | 03/04/2008 | Silver |
| F H L Finance Ltd | 00945804 | 03/03/1994 | 25/11/1996 | Dissolved |
| F H L Leasing (9/93) Ltd | 02747265 | 19/04/1994 | 25/11/1996 | Dissolved |
| F H L Leasing (Holdings) Ltd | 01649368 | 22/09/1992 | 25/11/1996 | Dissolved |
| FHL LEASING LIMITED | 02176163 | 29/07/1993 | 25/11/1996 | Dissolved |
| Fhl Leasing (September) Ltd | 02634562 | 19/04/1994 | 25/11/1996 | Dissolved |
| Fhl Leasing (Summer) Ltd | 02559015 | 27/10/1993 | 25/11/1996 | Dissolved |
| Geowarmth Ltd | 04940763 | 29/10/2004 | 27/02/2005 | Dissolved |
| Jayhold Ltd | 01945410 | 05/11/1992 | 06/04/2001 | Dissolved |
| LEITH INVESTMENTS LIMITED | SC335948 | 06/03/2008 | 15/11/2022 | Bronze |
| LEX AUTOLEASE (CH) LIMITED | 02528691 | 22/03/1995 | 28/04/1995 | Not Trading |
| NORTHUMBRIAN OVERSEAS INVESTMENTS LIMITED | 02820167 | 25/08/1993 | 22/09/1998 | Not Trading |
| NORTHUMBRIAN WATER PROJECTS LIMITED | 02528704 | 27/01/1999 | 06/04/2001 | Silver |
| NSI INDUSTRIAL O&M SOLUTIONS LTD | 02528695 | 06/02/2006 | 02/03/2009 | One Red Flag |
| Northumbrian International Holdings Ltd | 02489304 | 25/06/1993 | 06/04/2001 | Dissolved |
| ONDEO INDUSTRIAL SOLUTIONS UK LIMITED | 04319605 | 01/12/2005 | 02/03/2009 | Silver |
| PURITE HOLDINGS LIMITED | 03182773 | 01/12/2005 | 02/03/2009 | Silver |
| PURITE INTERNATIONAL LIMITED | 01887438 | 01/12/2005 | 02/03/2009 | Dissolved |
| St. Mary's Court Leasing Ltd | 01579859 | 05/11/1992 | 06/04/2001 | Dissolved |
| VEOLIA WATER PURIFICATION SYSTEMS LTD. | 01464412 | 01/12/2005 | 02/03/2009 | One Red Flag |
| WASTEWATER MANAGEMENT HOLDINGS LIMITED | SC201429 | 16/08/2000 | 03/04/2008 | Bronze |