| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Johnson Progress Ltd | 02744472 | 26/05/1998 | Dissolved |
| Jp Filtration Ltd | 02255854 | 26/05/1998 | Dissolved |
| Nck Crawler Cranes Ltd | 04035278 | 17/07/2000 | Dissolved |
| Spw Mechanical Engineers Ltd | 02308350 | 26/05/1998 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ELDER ENGINEERING LIMITED | 01562497 | 26/05/1998 | 17/03/2022 | Silver |
| NCK LIMITED | 02416584 | 26/05/1998 | 06/04/2012 | Not Trading |
| ROSS ENGINEERS LIMITED | 04283231 | 07/09/2001 | 17/11/2022 | Amber |
| S P W GROUP LIMITED | 04289360 | 18/09/2001 | 17/11/2022 | Not Trading |
| S.H. JOHNSON AND COMPANY LIMITED | 02549430 | 26/05/1998 | 17/11/2022 | Amber |
| SPW TRAFFIC CONTROL LIMITED | 01554163 | 26/05/1998 | 17/11/2022 | Strike Off |