| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ARC INDUSTRIAL SERVICES LIMITED | 07336158 | 15/01/2015 | Dissolved |
| BARRIER ARCHITECTURAL SERVICES LIMITED | 08212201 | 18/09/2012 | Silver |
| BARRIER FABRICATION LIMITED | 14731982 | 01/10/2024 | Bronze |
| BARRIER FIRE PROTECTION LIMITED | 03672680 | 08/06/2006 | Silver |
| BARRIER GROUP LIMITED | 03673848 | 08/06/2006 | Silver |
| BARRIER HVAC LIMITED | 14751568 | 01/10/2024 | Bronze |
| BARRIER HYDROBUOY LIMITED | 06407416 | 23/10/2007 | Dissolved |
| BARRIER INDUSTRIAL SERVICES LIMITED | 12546528 | 03/04/2020 | Not Trading |
| BARRIER LED LIMITED | 10385053 | 15/09/2020 | Dissolved |
| BARRIER LIMITED | 01226016 | 01/06/2005 | Bronze |
| CORE INDUSTRIAL SERVICES LIMITED | 10547725 | 05/01/2017 | Bronze |
| NIGHTINGALE FAMILY INVESTCO LIMITED | 14822934 | 24/04/2023 | Gold |
| TS NIALD LIMITED | 14828049 | 26/04/2023 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AQUASEAL RUBBER LIMITED | 02681117 | 31/07/2013 | 11/04/2024 | Silver |