| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CONTROL & SYSTEMS ENGINEERING LIMITED | 04299798 | 05/10/2001 | Silver |
| Control Systems Engineering Ltd | 03605996 | 29/07/1998 | Dissolved |
| Olivers (S&m) Ltd | 04057253 | 01/09/2000 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Williams Water & Waste Treatment Ltd | 03098977 | 06/09/1995 | 30/04/1998 | Dissolved |