| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BOKWOOD LIMITED | FC025673 | 23/12/2004 | Dissolved |
| BT EIGHTY-SIX LIMITED | 05225122 | 08/09/2004 | Dissolved |
| BT FINANCE B.V. | FC021994 | 31/08/1999 | Dissolved |
| BT FORTY-SIX | 02325907 | 25/10/2003 | Dissolved |
| BT GARRICK PLC | 04034043 | 30/06/2003 | Dissolved |
| BT GLOBAL NETWORKING B LIMITED | FC023558 | 27/11/2001 | Dissolved |
| BT LEASING LIMITED | 04942001 | 09/05/2005 | Dissolved |
| BT NEWGATE INVESTMENTS LIMITED | 04888476 | 04/09/2003 | Dissolved |
| BT NINETY-ONE LIMITED | 06341225 | 13/08/2007 | Dissolved |
| BT SEVENTY-THREE | 03800241 | 17/02/2006 | Dissolved |
| Bt Global Networking C Ltd | FC023559 | 27/11/2001 | Dissolved |
| Bt Interkom Holdings Ltd | 03437520 | 08/10/1997 | Dissolved |
| Bt Investment Capital Advisers Ltd | 04109612 | 25/10/2003 | Dissolved |
| CHATTISON (NO.2) LIMITED | FC025675 | 23/12/2004 | Dissolved |
| CHATTISON LIMITED | FC025408 | 27/08/2004 | Dissolved |
| RAVENSFIELD LIMITED | FC025678 | 24/12/2004 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BELMULLET (IOM) LIMITED | FC036648 | 26/09/2019 | 14/09/2020 | Bronze |
| BRITISH TELECOMMUNICATIONS FINANCE LIMITED | FC023049 | 06/03/2001 | 25/11/2003 | Dissolved |
| BT (INTERNATIONAL) HOLDINGS LIMITED | 02216586 | 23/12/2002 | 08/01/2003 | One Red Flag |
| BT (RRS LP) LIMITED | 04109640 | 18/11/2003 | 14/09/2020 | One Red Flag |
| BT COMMUNICATIONS IRELAND GROUP LIMITED | FC026254 | 04/10/2005 | 15/12/2010 | Amber |
| BT EIGHTY-FIVE LIMITED | 05213117 | 27/08/2004 | 30/03/2009 | Dissolved |
| BT EIGHTY-FOUR LIMITED | 05149396 | 18/06/2004 | 01/07/2010 | Dissolved |
| BT EIGHTY-ONE LIMITED | 04624419 | 25/10/2003 | 01/07/2010 | Dissolved |
| BT EIGHTY-SEVEN LIMITED | 05369151 | 18/02/2005 | 30/03/2009 | Dissolved |
| BT EQUIPMENT FINANCE LIMITED | 05440217 | 29/04/2005 | 09/05/2005 | Dissolved |
| BT GROUP INVESTMENTS LIMITED | 04278695 | 25/10/2003 | 14/09/2020 | Silver |
| BT HOLDINGS LIMITED | 02216773 | 19/12/2002 | 08/01/2003 | Bronze |
| Belcarra Investments Ltd | 03800109 | 23/09/1999 | 23/02/2006 | Dissolved |
| Bt Global Networks Holdings No. 2 Ltd | 02653079 | 14/08/1998 | 31/08/1998 | Dissolved |
| Bt Interkom Ltd | 02604357 | 26/05/1997 | 09/06/1997 | Dissolved |
| CEGETEL HOLDINGS LIMITED | 03407440 | 25/02/1999 | 07/03/1999 | Dissolved |
| COMMUNICATIONS NETWORKING SERVICES (UK) | 02840475 | 31/07/2006 | 08/08/2012 | Silver |
| DELETEWAY LIMITED | 04807713 | 18/06/2004 | 01/07/2010 | Dissolved |
| Esat Finance | 04293724 | 25/09/2001 | 22/07/2005 | Dissolved |
| GROUPBT LIMITED | 04177089 | 11/12/2014 | 14/09/2020 | Dissolved |