| NEO ENERGY PRODUCTION UK LIMITED | 12086835 |
| NEO NEXT + ENERGY ALPHA LIMITED | 04796268 |
| NEO NEXT + ENERGY BETA LIMITED | 04796282 |
| NEO NEXT + ENERGY DELTA LIMITED | 11021922 |
| NEO NEXT + ENERGY LNS LIMITED | 02483161 |
| NEO NEXT + ENERGY NORTH SEA LIMITED | 01061863 |
| NEO NEXT + ENERGY OIL TRADING LIMITED | 02307374 |
| NEO NEXT + ENERGY RESOURCES UK LIMITED | 00825828 |
| NEO NEXT+ ENERGY (PRODUCTION) LIMITED | 05896824 |
| NEO NEXT+ ENERGY (ZEX) LIMITED | 05834920 |
| NEO NEXT+ ENERGY CENTRAL NORTH SEA LIMITED | 05894683 |
| NEO NEXT+ ENERGY EXPLORATION UK LIMITED | 08266502 |
| NEO NEXT+ ENERGY GT LIMITED | 09187479 |
| NEO NEXT+ ENERGY NATURAL RESOURCES LIMITED | 13018823 |
| NEO NEXT+ ENERGY PETROLEUM LIMITED | 03288689 |
| RIGEL PETROLEUM (NI) LIMITED | NI029801 |
| RIGEL PETROLEUM UK LIMITED | 03389978 |
| TRANSWORLD PETROLEUM (U.K.) LIMITED | 01010787 |