| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DERWENT COGENERATION LIMITED | 02650621 | 12/02/2019 | 30/09/2019 | Dissolved |
| DISTRICT ENERGY LIMITED | 02362017 | 12/02/2019 | 30/09/2019 | Dissolved |
| GB DEVELOPERS LIMITED | 04480584 | 12/02/2019 | 30/09/2019 | Silver |
| REPONO BIDCO LIMITED | 09846864 | 12/02/2019 | 30/09/2019 | Dissolved |
| REPONO CM HOLDCO LIMITED | 09846907 | 12/02/2019 | 30/09/2019 | Dissolved |
| REPONO HOLDCO 1 LIMITED | 09844502 | 12/02/2019 | 30/09/2019 | Bronze |
| REPONO HOLDCO 2 LIMITED | 09844805 | 12/02/2019 | 30/09/2019 | Dissolved |
| REPONO INTERCO LIMITED | 09845638 | 12/02/2019 | 30/09/2019 | Dissolved |
| REPONO MIDCO LIMITED | 09846187 | 12/02/2019 | 30/09/2019 | Dissolved |
| SEMBCORP ENERGY UK LIMITED | 11369893 | 12/02/2019 | 30/09/2019 | Silver |
| SEMBCORP UTILITIES (UK) LIMITED | 04636301 | 12/02/2019 | 30/09/2019 | Silver |
| SIGBAT A LIMITED | 11296779 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT B LIMITED | 11296838 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT C LIMITED | 11296850 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT D LIMITED | 11296843 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT E LIMITED | 11296931 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT F LIMITED | 11296974 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT G LIMITED | 11297020 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT H LIMITED | 11297060 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT I LIMITED | 11297058 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT J LIMITED | 11297086 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT K LIMITED | 11297079 | 12/02/2019 | 30/09/2019 | Dissolved |
| SIGBAT L LIMITED | 11297092 | 12/02/2019 | 30/09/2019 | Dissolved |
| STALLINGBOROUGH PROPERTIES LIMITED | 06809430 | 12/02/2019 | 30/09/2019 | Silver |
| UK CAPACITY RESERVE LIMITED | 09152381 | 12/02/2019 | 30/09/2019 | Gold |
| UK DYNAMIC RESERVE LIMITED | 10890652 | 12/02/2019 | 30/09/2019 | Dissolved |
| UK ENERGY RESERVE LIMITED | 10260309 | 12/02/2019 | 30/09/2019 | Bronze |
| UK FLEXIBLE RESERVE LIMITED | 10896260 | 12/02/2019 | 30/09/2019 | Dissolved |
| UK POWER RESERVE (ASFORDBY) LIMITED | 07618247 | 12/02/2019 | 30/09/2019 | One Red Flag |
| UK POWER RESERVE (LTC) LIMITED | 07767865 | 12/02/2019 | 30/09/2019 | Dissolved |
| UK POWER RESERVE (MONCKTON ROAD) LIMITED | 07441588 | 12/02/2019 | 30/09/2019 | Amber |
| UK POWER RESERVE (SOUTH CORNELLY) LIMITED | 07923609 | 12/02/2019 | 30/09/2019 | Dissolved |
| UK POWER RESERVE (ST HELENS) LIMITED | 07677934 | 12/02/2019 | 30/09/2019 | Dissolved |
| UK POWER RESERVE (STYAL ROAD) LIMITED | 07692343 | 12/02/2019 | 30/09/2019 | Dissolved |
| UK POWER RESERVE (TRUMFLEET) LTD | 07004203 | 12/02/2019 | 30/09/2019 | Bronze |
| UK POWER RESERVE LIMITED | 07385282 | 12/02/2019 | 30/09/2019 | Bronze |
| UK UTILITY RESERVE LIMITED | 11008814 | 12/02/2019 | 30/09/2019 | Silver |
| WILTON ENERGY LIMITED | 04557531 | 08/03/2019 | 30/09/2019 | Bronze |