| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BOLT PRO TEM LIMITED | 08975479 | 20/01/2021 | Amber |
| CITYFIBRE HOLDCO LIMITED | 11722699 | 20/01/2021 | Amber |
| CITYFIBRE HOLDINGS LIMITED | 07488363 | 20/01/2021 | Amber |
| CITYFIBRE INFRASTRUCTURE HOLDINGS LIMITED | 08772997 | 20/01/2021 | Amber |
| CITYFIBRE LIMITED | 09759465 | 20/01/2021 | Two Red Flags |
| CITYFIBRE METRO NETWORKS LIMITED | 06586002 | 20/01/2021 | Amber |
| CITYFIBRE NETWORKS LIMITED | 07193219 | 20/01/2021 | Bronze |
| CONNECT INFRASTRUCTURE BIDCO LIMITED | 11320032 | 20/01/2021 | Silver |
| CONNECT INFRASTRUCTURE TOPCO LIMITED | 11319944 | 20/01/2021 | Amber |
| ENTANET HOLDINGS LIMITED | 07902027 | 20/01/2021 | Amber |
| ENTANET INTERNATIONAL LIMITED | 03274237 | 20/01/2021 | Amber |
| FIBRECITY BOURNEMOUTH LTD | 06585858 | 20/01/2021 | Amber |
| FIBRECITY HOLDINGS LTD | 06586083 | 20/01/2021 | Strike Off |
| FIBRENATION LIMITED | 11441177 | 20/01/2021 | Silver |
| GIGLER LIMITED | 06555306 | 20/01/2021 | Dissolved |
| LIT FIBRE GROUP LTD | 12560467 | 13/05/2024 | Amber |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AIRPORT OPERATORS ASSOCIATION LTD. | 01041754 | 08/09/2014 | 10/09/2020 | Silver |
| CENTRICA COMBINED COMMON INVESTMENT FUND LIMITED | 04541886 | 23/09/2002 | 15/11/2007 | Not Trading |
| CENTRICA ENERGY (TRADING) LIMITED | 02877397 | 28/04/2005 | 28/04/2005 | Dissolved |
| EP SHB LIMITED | 02571241 | 28/04/2005 | 18/10/2005 | Silver |
| GATWICK AIRPORT LIMITED | 01991018 | 21/04/2010 | 31/12/2020 | Bronze |
| HUMBERLAND LIMITED | 02949541 | 28/04/2005 | 18/10/2005 | Not Trading |
| LIT FIBRE LTD | 13138313 | 13/05/2024 | 31/10/2024 | Amber |
| SPIRIT ENERGY PRODUCTION UK LIMITED | 03115179 | 28/04/2005 | 19/01/2006 | Gold |
| SPIRIT ENERGY RESOURCES LIMITED | 02855151 | 28/04/2005 | 19/01/2006 | Silver |