| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CTL SEAL LIMITED | 06837452 | 24/11/2021 | Gold |
| DIAMOND DESIGN SERVICES LIMITED | 13690978 | 20/10/2021 | Not Trading |
| DIAMOND RAIL GROUP LIMITED | 11019392 | 27/10/2020 | Gold |
| DIAMOND RAIL SERVICES (UK) LIMITED | 07364847 | 27/10/2020 | Silver |
| DIAMOND RESPONSIVE ENGINEERING LIMITED | 10051798 | 25/02/2021 | Gold |
| NICHE ENGINEERING LIMITED | 09784186 | 11/03/2021 | Dissolved |
| TFL RESPONSIVE ENGINEERING LIMITED | 05927511 | 25/02/2021 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BRITISH SILVERWARE LIMITED | 05409533 | 27/06/2017 | 11/10/2017 | Silver |
| DELUXE TABLEWARE LTD | 09825242 | 15/12/2015 | 07/02/2017 | Gold |
| GLOBESCO LIMITED | 09659439 | 26/06/2015 | 29/07/2021 | Dissolved |