| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| T B DAVIES (CARDIFF) LIMITED | 00534073 | 06/06/1996 | Bronze |
| T B DAVIES (HOLDINGS) LIMITED | 05226830 | 09/09/2004 | Silver |
| TEST & RESEARCH CENTRE HOLDINGS LTD | 11736725 | 09/11/2023 | Bronze |
| TEST & RESEARCH CENTRE LTD | 11736670 | 09/11/2023 | One Red Flag |
| TEST & RESEARCH GROUP LTD | 16156946 | 31/12/2024 | Amber |
| THE LADDER ASSOCIATION LIMITED | 06156473 | 09/03/2021 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| OWEN HOLLAND (ENGINEERING) LIMITED | 00866164 | 14/07/2009 | 02/07/2014 | Not Trading |
| PREFABRICATED ACCESS SUPPLIERS' AND MANUFACTURERS' ASSOCIATION LTD | 01397880 | 27/10/2022 | 30/05/2024 | Silver |
| TBD (OWEN HOLLAND) LIMITED | 04801056 | 17/03/2004 | 02/07/2014 | Silver |