| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Nationwide Heating Services Ltd | 02464577 | 29/01/1991 | Dissolved |
| Nationwide Heating Services Ltd | 02464577 | 29/01/1991 | Dissolved |
| Systemheat Ltd | 02324575 | 15/06/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Anstee Air Components Ltd | 02694227 | 01/04/1992 | 12/01/1953 | Dissolved |
| Coventry Ductworks Ltd | 02625768 | 02/07/1991 | 18/12/1992 | Dissolved |
| Delta Environmental Ltd | 03453462 | 22/10/1997 | 01/02/1999 | Dissolved |