| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CONSTRUCTION CHEMISTRY SOLUTIONS LIMITED | 08937318 | 27/04/2016 | Dissolved |
| CONSTRUCTION TESTING SOLUTIONS (MIDLANDS) LIMITED | 09430805 | 27/04/2016 | Dissolved |
| CONSTRUCTION TESTING SOLUTIONS (SPECIALIST) LIMITED | 09430728 | 27/04/2016 | Dissolved |
| ESSELTEST LIMITED | 06216989 | 20/08/2019 | Dissolved |
| SWH CONSULTING LIMITED | 07447906 | 23/11/2010 | Dissolved |
| TRIAQUA LIMITED | 10443987 | 28/02/2018 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CARD GEOTECHNICS LIMITED | 02993862 | 30/11/2020 | 15/01/2021 | Gold |
| CET STRUCTURES LTD. | 02527130 | 27/03/2012 | 31/08/2022 | Gold |
| CGL 2014 LIMITED | 08840267 | 30/11/2020 | 15/01/2021 | Silver |
| CIT REALISATIONS LIMITED | 01182024 | 29/10/2004 | 19/09/2005 | Amber |
| CIT REALISATIONS LIMITED | 01182024 | 03/02/2003 | 19/09/2005 | Amber |
| CONSTRUCTION & ENGINEERING TESTING GROUP LIMITED | 02323390 | 02/07/2018 | 31/08/2022 | Dissolved |
| CONSTRUCTION TESTING SOLUTIONS GROUP HOLDINGS LIMITED | 05340145 | 27/03/2012 | 22/10/2021 | Gold |
| CONSTRUCTION TESTING SOLUTIONS LIMITED | 05998333 | 27/04/2016 | 15/01/2021 | Bronze |
| Chiltern Invadex (Ni) Ltd | NI019958 | 01/06/2004 | 19/09/2005 | Dissolved |
| Cig Realisations Ltd | 04891982 | 29/10/2004 | 19/09/2005 | Dissolved |
| Cig Realisations Ltd | 04891982 | 11/11/2003 | 19/09/2005 | Dissolved |
| Haydn Care Ltd | 02678874 | 29/10/2004 | 19/09/2005 | Dissolved |
| Haydn Care Ltd | 02678874 | 01/06/2004 | 19/09/2005 | Dissolved |
| PHENNA INFRASTRUCTURE UK LIMITED | 11627758 | 23/11/2018 | 22/10/2021 | Silver |
| PROJECT C TOPCO LIMITED | 11623468 | 23/11/2018 | 22/10/2021 | Silver |
| PROPERTY ASSURE LIMITED | 03361391 | 01/10/2013 | 31/08/2022 | Not Trading |
| SIMPLIFI TECHNOLOGIES LIMITED | 05643680 | 02/07/2018 | 31/08/2022 | Not Trading |
| THE TESTING GROUP LIMITED | 09430520 | 27/04/2016 | 22/10/2021 | Amber |