| Northern Ireland Water Limited | Northern Ireland Water Limited | environmental violation | 2016 | UK-NIEA | £20,000 |
| SSE plc | SSE PLC | price-fixing or anti-competitive practices | 2016 | UK-OFGEM | £0 |
| ScottishPower Energy Retail Limited | Iberdrola | consumer protection violation | 2016 | UK-OFGEM | £18,000,000 |
| npower Limited et al. | E.ON | consumer protection violation | 2016 | UK-OFGEM | £26,000,000 |
| Anglian Water Limited | Anglian Water Group Limited | environmental violation | 2016 | UK-EA | £0 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | water pollution violation | 2016 | UK-EA | £1,018,233 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | environmental violation | 2016 | UK-EA | £0 |
| Yorkshire Water Services Ltd | Kelda Group | water pollution violation | 2016 | UK-EA | £624,000 |
| Chemwaste Ltd Registered Company | Beauparc | environmental violation | 2016 | UK-EA | £0 |
| Portsmouth Water Limited | Ancala Water Services | environmental violation | 2016 | UK-EA | £0 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | water pollution violation | 2016 | UK-EA | £403,212 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | environmental violation | 2016 | UK-EA | £0 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | environmental violation | 2016 | UK-EA | £0 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | environmental violation | 2016 | UK-EA | £0 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | water pollution violation | 2016 | UK-EA | £80,000 |
| Severn Trent Water Ltd | Severn Trent PLC | environmental violation | 2016 | UK-EA | £0 |
| Yorkshire Water Services Limited Registered Company | Kelda Group | environmental violation | 2016 | UK-EA | £0 |
| Yorkshire Water Services Ltd | Kelda Group | water pollution violation | 2016 | UK-EA | £613,536 |
| Yorkshire Water Services Ltd | Kelda Group | water pollution violation | 2016 | UK-EA | £513,536 |
| Yorkshire Water Services Ltd | Kelda Group | environmental violation | 2016 | UK-EA | £0 |
| Northumbrian Water Ltd | Northumbrian Water Limited | environmental violation | 2016 | UK-EA | £0 |
| South West Water Limited Registered Company | Pennon Group PLC | environmental violation | 2016 | UK-EA | £0 |
| United Utilities Water Limited | United Utilities Group PLC | environmental violation | 2016 | UK-EA | £0 |
| United Utilities Water Limited | United Utilities Group PLC | environmental violation | 2016 | UK-EA | £0 |
| United Utilities Water Limited | United Utilities Group PLC | environmental violation | 2016 | UK-EA | £0 |
| United Utilities Water PLC | United Utilities Group PLC | water pollution violation | 2016 | UK-EA | £619,090 |
| Severn Trent Water Limited | Severn Trent PLC | environmental violation | 2016 | UK-EA | £0 |
| Severn Trent Water Limited | Severn Trent PLC | environmental violation | 2016 | UK-EA | £0 |
| Anglain Water Services Limited | Anglian Water Group Limited | environmental violation | 2016 | UK-EA | £0 |
| Severn Trent Water Limited | Severn Trent PLC | water pollution violation | 2016 | UK-EA | £240,000 |
| Severn Trent Water Limited | Severn Trent PLC | water pollution violation | 2016 | UK-EA | £120,000 |
| Severn Trent Water Limited | Severn Trent PLC | environmental violation | 2016 | UK-EA | £66,000 |
| Severn Trent Water Limited | Severn Trent PLC | environmental violation | 2016 | UK-EA | £0 |
| Severn Trent Water Limited | Severn Trent PLC | environmental violation | 2016 | UK-EA | £0 |
| Yorkshire Water Services Ltd | Kelda Group | water pollution violation | 2016 | UK-EA | £380,000 |
| South West Water Limited | Pennon Group PLC | environmental violation | 2016 | UK-EA | £0 |
| United Utilities Ltd | United Utilities Group PLC | environmental violation | 2016 | UK-EA | £0 |
| Yorkshire Water Services Ltd | Kelda Group | environmental violation | 2016 | UK-EA | £0 |
| Severn Trent Water Limited | Severn Trent PLC | environmental violation | 2016 | UK-EA | £0 |
| OVO Energy | OVO Energy | consumer protection violation | 2016 | UK-OFGEM | £54,000 |
| E.ON | E.ON | consumer protection violation | 2016 | UK-OFGEM | £3,100,000 |
| National Grid | National Grid | energy market violation | 2016 | UK-OFGEM | £3,000,000 |
| Wessex Water | YTL Power International | water pollution violation | 2016 | UK-DWI | £0 |
| Severn Trent Water | Severn Trent PLC | water pollution violation | 2016 | UK-DWI | £0 |
| Wessex Water | YTL Power International | water pollution violation | 2016 | UK-DWI | £0 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | water pollution violation | 2017 | UK-EA | £8,000,000 |
| British Gas Trading Limited | Centrica | labour standards violation | 2017 | UK-ET | £30,407 |
| RWE GENERATION UK PLC | RWE AG | labour standards violation | 2017 | UK-ET | £20,200 |
| Fusion Heating Limited | SSE PLC | labour standards violation | 2017 | UK-BEIS | £4,354 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | water pollution violation | 2017 | UK-EA | £269,000 |
| Anglian Water Services Limited | Anglian Water Group Limited | water pollution violation | 2017 | UK-EA | £100,000 |
| Wessex Water Services Limited | YTL Power International | water pollution violation | 2017 | UK-EA | £75,000 |
| South West Water Limited | Pennon Group PLC | water pollution violation | 2017 | UK-EA | £64,500 |
| Anglian Water Services Limited | Anglian Water Group Limited | environmental violation | 2017 | UK-EA | £60,000 |
| Anglian Water Services Limited | Anglian Water Group Limited | water pollution violation | 2017 | UK-EA | £30,000 |
| Dwr Cymru Welsh Water | Dwr Cymru Cyfyngedig (Welsh Water) | water pollution violation | 2017 | UK-EA | £28,000 |
| South West Water Limited | Pennon Group PLC | water pollution violation | 2017 | UK-EA | £25,400 |
| Anglian Water Services Limited Registered Company | Anglian Water Group Limited | environmental violation | 2017 | UK-EA | £0 |
| Northumbrian Water Limited | Northumbrian Water Limited | water pollution violation | 2017 | UK-EA | £390,000 |
| Anglian Water Services Limited | Anglian Water Group Limited | water pollution violation | 2017 | UK-EA | £100,000 |
| Anglian Water Services Limited | Anglian Water Group Limited | water pollution violation | 2017 | UK-EA | £100,000 |
| Anglian Water Services Limited | Anglian Water Group Limited | water pollution violation | 2017 | UK-EA | £20,000 |
| UK Power Networks (Operations) Limited | UK Power Networks | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Siemens Gamesa Renewable Energy Limited | Siemens Energy | workplace safety or health violation | 2017 | UK-HSE | £549,608 |
| Spirit Energy Production UK Limited | Centrica | workplace safety or health violation | 2017 | UK-HSE | £0 |
| National Grid Gas PLC | National Gas Transmission PLC | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | workplace safety or health violation | 2017 | UK-HSE | £316,419 |
| Spirit Energy Production UK Limited | Centrica | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Spirit Energy Production UK Limited | Centrica | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Power Distribution (South Wales) plc | National Grid | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Siemens Gamesa Renewable Energy Limited | Siemens Energy | workplace safety or health violation | 2017 | UK-HSE | £76,106 |
| Avanti Gas Limited | UGI Corp. | workplace safety or health violation | 2017 | UK-HSE | £0 |
| SSE Airtricity Energy Supply Limited | SSE PLC | utility violation | 2017 | UK-NIAUR | £75,000 |
| Northern Ireland Water Limited | Northern Ireland Water Limited | environmental violation | 2017 | UK-NIEA | £8,250 |
| Northern Ireland Water Limited | Northern Ireland Water Limited | environmental violation | 2017 | UK-NIEA | £8,250 |
| Northern Ireland Water Limited | Northern Ireland Water Limited | environmental violation | 2017 | UK-NIEA | £30,000 |
| Northern Ireland Water Limited | Northern Ireland Water Limited | environmental violation | 2017 | UK-NIEA | £40,000 |
| Northern Ireland Water Limited | Northern Ireland Water Limited | environmental violation | 2017 | UK-NIEA | £30,000 |
| EDF Energy Nuclear Generation Ltd | EDF-Electricite de France | nuclear safety violation | 2017 | UK-ONR | £0 |
| SSE plc | SSE PLC | consumer protection violation | 2017 | UK-OFGEM | £0 |
| British Gas Trading Limited | Centrica | consumer protection violation | 2017 | UK-OFGEM | £9,500,000 |
| British Gas Trading Limited | Centrica | energy market violation | 2017 | UK-OFGEM | £4,500,000 |
| South West Water Limited | Pennon Group PLC | water pollution violation | 2017 | UK-EA | £50,000 |
| South West Water Limited | Pennon Group PLC | water pollution violation | 2017 | UK-EA | £175,000 |
| South West Water Limited | Pennon Group PLC | environmental violation | 2017 | UK-EA | £10,000 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | water pollution violation | 2017 | UK-EA | £9,000,000 |
| Thames Water Utilities | Thames Water Utilities Ltd. | water pollution violation | 2017 | UK-EA | £1,000,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | water pollution violation | 2017 | UK-EA | £800,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | water pollution violation | 2017 | UK-EA | £800,000 |
| Thames Water Utilities Ltd | Thames Water Utilities Ltd. | water pollution violation | 2017 | UK-EA | £150,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | environmental violation | 2017 | UK-EA | £0 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | environmental violation | 2017 | UK-EA | £0 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | environmental violation | 2017 | UK-EA | £0 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | environmental violation | 2017 | UK-EA | £0 |
| Thames Water Utilities | Thames Water Utilities Ltd. | environmental violation | 2017 | UK-EA | £0 |
| Thames Water Utilities | Thames Water Utilities Ltd. | environmental violation | 2017 | UK-EA | £0 |
| Thames Water Utilities | Thames Water Utilities Ltd. | environmental violation | 2017 | UK-EA | £0 |
| South West Water Limited | Pennon Group PLC | water pollution violation | 2017 | UK-EA | £80,000 |
| South West Water Limited | Pennon Group PLC | environmental violation | 2017 | UK-EA | £70,000 |
| Anglian Water Services Ltd | Anglian Water Group Limited | environmental violation | 2017 | UK-EA | £0 |
| Yorkshire Water Services Ltd | Kelda Group | water pollution violation | 2017 | UK-EA | £600,000 |
