| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CORNERSTONE TELECOMMUNICATIONS INFRASTRUCTURE LIMITED | 08087551 | 14/01/2020 | One Red Flag |
| GRANSTONE HOLDCO LIMITED | 14907010 | 15/11/2023 | Bronze |
| O2 NETWORKS LIMITED | 02604351 | 15/11/2023 | Bronze |
| VIRGIN MEDIA BUSINESS LIMITED | 01785381 | 01/10/2021 | Bronze |
| VIRGIN MEDIA LIMITED | 02591237 | 01/10/2021 | Silver |
| VIRGIN MEDIA MOBILE FINANCE LIMITED | 09058868 | 24/10/2023 | Silver |
| VIRGIN MEDIA OPERATIONS LIMITED | 11118162 | 01/10/2021 | Bronze |
| VIRGIN MEDIA PAYMENTS LTD | 06024812 | 01/10/2021 | One Red Flag |
| VIRGIN MEDIA WHOLESALE LIMITED | 02514287 | 01/10/2021 | Gold |
| VIRGIN MOBILE TELECOMS LIMITED | 03707664 | 01/10/2021 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| GIFFGAFF LIMITED | 04196996 | 05/10/2018 | 22/04/2022 | Gold |
| MMO2 LIMITED | 04190833 | 29/03/2018 | 17/06/2021 | Not Trading |
| O2 HOLDINGS LIMITED | 02604354 | 29/03/2018 | 29/04/2022 | Bronze |
| TELEFONICA CYBERSECURITY TECH UK LIMITED | 12490724 | 02/03/2020 | 21/06/2021 | Amber |
| TELEFONICA O2 HOLDINGS LIMITED | 05310128 | 07/11/2011 | 17/06/2021 | Silver |
| WEVE LIMITED | 08178832 | 28/11/2019 | 10/05/2022 | Silver |