| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| EASTERN POWER NETWORKS PLC | 02366906 | 24/11/2010 | 28/02/2014 | Bronze |
| LONDON POWER NETWORKS PLC | 03929195 | 24/11/2010 | 28/02/2014 | Silver |
| SOUTH EASTERN POWER NETWORKS PLC | 03043097 | 24/11/2010 | 28/02/2014 | Silver |
| UK POWER NETWORKS HOLDINGS LIMITED | 07290590 | 24/11/2010 | 28/02/2014 | Bronze |
| UK POWER NETWORKS SERVICES HOLDINGS LIMITED | 07306419 | 24/11/2010 | 28/02/2014 | Silver |
| WALES & WEST GAS NETWORKS (HOLDINGS) LIMITED | 05095454 | 10/10/2012 | 28/02/2014 | Silver |
| WALES & WEST GAS NETWORKS (JUNIOR FINANCE) LIMITED | 05149491 | 10/10/2012 | 28/02/2014 | Dissolved |
| WALES & WEST GAS NETWORKS (SENIOR FINANCE) LIMITED | 05149493 | 10/10/2012 | 28/02/2014 | Dissolved |
| WALES & WEST UTILITIES FINANCE PLC | 06766848 | 10/10/2012 | 28/02/2014 | Silver |
| WALES & WEST UTILITIES HOLDINGS LIMITED | 07092596 | 10/10/2012 | 28/02/2014 | Silver |
| WALES & WEST UTILITIES LIMITED | 05046791 | 10/10/2012 | 28/02/2014 | Silver |
| WEST GAS NETWORKS LIMITED | 08151511 | 10/10/2012 | 28/02/2014 | Silver |
| WESTERN GAS NETWORKS LIMITED | 08151473 | 10/10/2012 | 28/02/2014 | Silver |