| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CTAC LIMITED | 04994638 | 15/04/2010 | Not Trading |
| KEYGUARD U.K LIMITED | 06018340 | 05/03/2019 | One Red Flag |
| LAWNSCOTE HOLDINGS LIMITED | 13834995 | 29/04/2022 | Bronze |
| LONGMOOR SECURITY SERVICES LIMITED | 07729757 | 05/09/2016 | Not Trading |
| SIBFORD SCHOOL | 03487651 | 22/03/2014 | Bronze |
| SOVEREIGN FERRIES LIMITED | 09170338 | 01/10/2014 | One Red Flag |
| WESTMINSTER AVIATION SECURITY SERVICES LIMITED | 04030072 | 05/10/2000 | Bronze |
| WESTMINSTER GROUP PLC | 03967650 | 18/05/2007 | Bronze |
| WESTMINSTER INTERNATIONAL LIMITED | 04090560 | 29/03/2005 | Silver |
| WESTMINSTER MARITIME SERVICES LTD | 05135771 | 01/10/2014 | Not Trading |
| WESTMINSTER OPERATING LIMITED | 08566914 | 12/06/2013 | One Red Flag |
| WESTMINSTER SERVICES LIMITED | 05428232 | 25/02/2008 | One Red Flag |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AMBA DEFENCE CONTROL LTD | 05753656 | 15/04/2010 | 27/03/2013 | Dissolved |
| AMBA DEFENCE SOLUTIONS LTD | 04223880 | 18/05/2007 | 27/03/2013 | Dissolved |
| KEYGUARD U.K LIMITED | 06018340 | 08/11/2018 | 13/02/2019 | One Red Flag |
| TRAVEL SAFETY AND SECURITY LTD | 07729983 | 24/05/2017 | 16/02/2018 | Dissolved |
| WESTMINSTER JV HOLDINGS LTD | 10198123 | 18/08/2016 | 13/10/2016 | Dissolved |