| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CHESHIRE CAVITY STORAGE 1 LIMITED | 06438979 | 06/06/2018 | 01/01/2020 | Silver |
| CHESHIRE CAVITY STORAGE GROUP LIMITED | 03875121 | 06/06/2018 | 01/01/2020 | Dissolved |
| EDF ENERGY (THERMAL GENERATION) LIMITED | 04267569 | 01/01/2018 | 01/01/2020 | Gold |
| EDF ENERGY NUCLEAR GENERATION LIMITED | 03076445 | 01/01/2018 | 01/01/2020 | Bronze |
| KISTOS ENERGY STORAGE LIMITED | 02850057 | 06/06/2018 | 01/01/2020 | One Red Flag |
| NUCLEAR RESTORATION SERVICES LIMITED | 02264251 | 01/06/2020 | 31/01/2024 | Silver |