| SOUTHERN WATER SERVICES LTD | Macquarie | financial services | water pollution violation | 2021 | UK-EA | £90,000,000 |
| Flybe Limited | Flybe Limited | airlines | climate change regime violation | 2020 | UK-EA | £51,885,049 |
| Monarch Airlines Limited | Monarch Airlines Limited | airlines | climate change regime violation | 2020 | UK-EA | £48,154,044 |
| Thomas Cook Airlines Limited | | | climate change regime violation | 2020 | UK-EA | £32,137,926 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2017 | UK-EA | £9,000,000 |
| Tesco Stores Ltd | Tesco PLC | retailing | oil spill | 2017 | UK-EA | £8,057,434 |
| Thames Water Utilities Ltd. | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2017 | UK-EA | £8,000,000 |
| THAMES WATER UTILITIES LIMITED | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2021 | UK-EA | £4,090,713 |
| THAMES WATER UTILITIES LIMITED | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2021 | UK-EA | £4,084,669 |
| THAMES WATER UTILITIES LIMITED | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2023 | UK-EA | £3,458,961 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2021 | UK-EA | £2,387,944 |
| South West Water | Pennon Group PLC | utilities and power generation | water pollution violation | 2023 | UK-EA | £2,150,000 |
| Severn Trent Water | Severn Trent PLC | utilities and power generation | water pollution violation | 2024 | UK-EA | £2,088,657 |
| Southern Water Services Limited | Macquarie | financial services | water pollution violation | 2016 | UK-EA | £2,000,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2019 | UK-EA | £1,879,991 |
| BIFFA WASTE SERVICES LIMITED | Energy Capital Partners | private equity (including portfolio companies) | hazardous waste violation | 2021 | UK-EA | £1,692,215 |
| Yorkshire Water Services Ltd. | Kelda Group | utilities and power generation | water pollution violation | 2022 | UK-EA | £1,623,032 |
| HERTFORDSHIRE OIL STORAGE LIMITED | Prax Group | oil and gas | environmental violation | 2010 | UK-EA | £1,450,000 |
| SEVERN TRENT WATER LIMITED | Severn Trent PLC | utilities and power generation | water pollution violation | 2021 | UK-EA | £1,029,182 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2016 | UK-EA | £1,018,233 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2023 | UK-EA | £1,000,000 |
| Thames Water Utilities | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2017 | UK-EA | £1,000,000 |
| Wessex Water Services Limited | YTL Power International | utilities and power generation | water pollution violation | 2018 | UK-EA | £975,000 |
| Roydon Resource Recovery Ltd | | | hazardous waste violation | 2024 | UK-EA | £870,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2017 | UK-EA | £800,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2017 | UK-EA | £800,000 |
| UNITED UTILITIES WATER LIMITED | United Utilities Group PLC | utilities and power generation | water pollution violation | 2023 | UK-EA | £800,000 |
| EUROPEAN METAL RECYCLING LIMITED | Ausurus Group Ltd | metals | hazardous waste violation | 2021 | UK-EA | £772,958 |
| SHELL UK LIMITED | Shell PLC | oil and gas | environmental violation | 2011 | UK-EA | £710,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2019 | UK-EA | £707,120 |
| NORTHUMBRIA WATER LIMITED | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2021 | UK-EA | £682,170 |
| United Utilities Water LTD | United Utilities Group PLC | utilities and power generation | water pollution violation | 2017 | UK-EA | £666,000 |
| Costcutter Supermarkets Group Limited | | | environmental violation | 2017 | UK-EA | £650,752 |
| INTERNATIONAL PAINT LIMITED | Akzo Nobel | paints and coatings | water pollution violation | 2023 | UK-EA | £650,000 |
| Yorkshire Water Services Ltd | Kelda Group | utilities and power generation | water pollution violation | 2016 | UK-EA | £624,000 |
| United Utilities Water PLC | United Utilities Group PLC | utilities and power generation | water pollution violation | 2016 | UK-EA | £619,090 |
| Yorkshire Water Services Ltd | Kelda Group | utilities and power generation | water pollution violation | 2016 | UK-EA | £613,536 |
| Encirc Limited | | | environmental violation | 2023 | UK-EA | £606,981 |
| Yorkshire Water Services Ltd | Kelda Group | utilities and power generation | water pollution violation | 2017 | UK-EA | £600,000 |
| TOTAL UK LIMITED | TotalEnergies SE | oil and gas | water pollution violation | 2010 | UK-EA | £600,000 |
| Severn Trent Water Ltd | Severn Trent PLC | utilities and power generation | water pollution violation | 2019 | UK-EA | £550,813 |
| Northumbrian Water Ltd | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2019 | UK-DWI | £532,687 |
| Southern Water Services Ltd | Macquarie | financial services | water pollution violation | 2017 | UK-DWI | £530,000 |
| SEVERN TRENT WATER LIMITED | Severn Trent PLC | utilities and power generation | water pollution violation | 2021 | UK-EA | £529,182 |
| ANGLIAN WATER SERVICES LIMITED | Anglian Water Group Limited | utilities and power generation | water pollution violation | 2022 | UK-EA | £521,302 |
| Southern Water Services Ltd | Macquarie | financial services | water pollution violation | 2014 | UK-EA | £519,224 |
| Yorkshire Water Services Ltd | Kelda Group | utilities and power generation | water pollution violation | 2016 | UK-EA | £513,536 |
| United Utilities Water Limited | United Utilities Group PLC | utilities and power generation | water pollution violation | 2019 | UK-EA | £511,000 |
| OMEX Agriculture Ltd | | | water pollution violation | 2023 | UK-EA | £510,190 |
| Winters Haulage Ltd | | | hazardous waste violation | 2019 | UK-EA | £510,000 |
| ANGLIAN WATER SERVICES LIMITED | Anglian Water Group Limited | utilities and power generation | water pollution violation | 2023 | UK-EA | £510,000 |
| Diageo Scotland Limited | Diageo | beverages | climate change regime violation | 2022 | UK-SEPA | £507,624 |
| United Utilities Water Limited | United Utilities Group PLC | utilities and power generation | water pollution violation | 2019 | UK-EA | £500,000 |
| Taylor Wimpey | Taylor Wimpey PLC | construction and engineering | water pollution violation | 2023 | UK-NRW | £488,772 |
| PUPL Realisation Ltd | | | climate change regime violation | 2017 | UK-EA | £460,895 |
| United Utilities Water Ltd | United Utilities Group PLC | utilities and power generation | water pollution violation | 2017 | UK-DWI | £450,000 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2020 | UK-EA | £435,270 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2020 | UK-EA | £435,270 |
| Persimmon Homes Limited | Persimmon PLC | construction and engineering | water pollution violation | 2022 | UK-NRW | £433,161 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2018 | UK-EA | £418,123 |
| HiPP UK Limited | | | water pollution violation | 2014 | UK-EA | £414,960 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2016 | UK-EA | £403,212 |
| Northumbrian Water Limited | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2017 | UK-EA | £390,000 |
| Yorkshire Water Services Ltd | Kelda Group | utilities and power generation | water pollution violation | 2016 | UK-EA | £380,000 |
| Mettis Aerospace Limited | | | water pollution violation | 2020 | UK-EA | £379,500 |
| ANGLIAN WATER SERVICES LIMITED | Anglian Water Group Limited | utilities and power generation | water pollution violation | 2022 | UK-EA | £368,802 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2021 | UK-EA | £368,752 |
| Diageo Scotland Limited | Diageo | beverages | climate change regime violation | 2022 | UK-SEPA | £358,611 |
| Highlands & Islands Airports Limited | | | water pollution violation | 2017 | UK-SEPA | £356,270 |
| British Ceramic Tile Ltd (In Administration) | | | climate change regime violation | 2021 | UK-EA | £352,722 |
| Laing O’Rourke Delivery Limited | Laing O'Rourke | construction and engineering | water pollution violation | 2023 | UK-EA | £350,001 |
| Northumbrian Water Limited | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2019 | UK-EA | £350,000 |
| Northumbrian Water Limited | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2019 | UK-EA | £350,000 |
| South West Water Limited | Pennon Group PLC | utilities and power generation | water pollution violation | 2019 | UK-EA | £350,000 |
| Powerday PLC | | | hazardous waste violation | 2016 | UK-EA | £350,000 |
| Powerday PLC | | | environmental violation | 2016 | UK-EA | £350,000 |
| Southern Water | Macquarie | financial services | water pollution violation | 2024 | UK-EA | £348,945 |
| Diageo Scotland Limited | Diageo | beverages | climate change regime violation | 2022 | UK-SEPA | £346,153 |
| OES Ltd | | | hazardous waste violation | 2016 | UK-SEPA | £345,558 |
| CHC Scotia Limited | | | environmental violation | 2017 | UK-EA | £344,949 |
| South West Water Ltd | Pennon Group PLC | utilities and power generation | water pollution violation | 2022 | UK-DWI | £317,470 |
| ANGLIAN WATER SERVICES LIMITED | Anglian Water Group Limited | utilities and power generation | water pollution violation | 2023 | UK-EA | £316,690 |
| Wessex Water Services Ltd | YTL Power International | utilities and power generation | water pollution violation | 2023 | UK-DWI | £301,847 |
| Banham Poultry Limited | | | environmental violation | 2022 | UK-EA | £300,000 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2020 | UK-EA | £300,000 |
| BRITISH PIPELINE AGENCY LIMITED | | | water pollution violation | 2010 | UK-EA | £300,000 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2021 | UK-EA | £300,000 |
| Anglian Water Limited | Anglian Water Group Limited | utilities and power generation | water pollution violation | 2022 | UK-EA | £300,000 |
| Essar Oil (UK) Limited | Essar Group | diversified | environmental violation | 2015 | UK-EA | £297,284 |
| Northumbrian Water Limited | Northumbrian Water Limited | utilities and power generation | water pollution violation | 2022 | UK-EA | £274,000 |
| Severn Trent Water Limited | Severn Trent PLC | utilities and power generation | water pollution violation | 2021 | UK-EA | £270,000 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2017 | UK-EA | £269,000 |
| United Utilities Water PLC | United Utilities Group PLC | utilities and power generation | water pollution violation | 2015 | UK-EA | £262,873 |
| United Utilities Water PLC | United Utilities Group PLC | utilities and power generation | water pollution violation | 2015 | UK-EA | £262,873 |
| United Utilities Water PLC | United Utilities Group PLC | utilities and power generation | water pollution violation | 2015 | UK-EA | £262,873 |
| Thames Water Utilities Limited | Thames Water Utilities Ltd. | utilities and power generation | water pollution violation | 2015 | UK-EA | £256,887 |
| United Utilities Water Ltd | United Utilities Group PLC | utilities and power generation | water pollution violation | 2018 | UK-DWI | £254,000 |
| Filippo Berio UK Limited | | | environmental violation | 2017 | UK-EA | £253,906 |
| Yorkshire Water Services Ltd | Kelda Group | utilities and power generation | water pollution violation | 2022 | UK-EA | £251,936 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2020 | UK-EA | £250,000 |
| Yorkshire Water Services Limited | Kelda Group | utilities and power generation | water pollution violation | 2022 | UK-EA | £250,000 |
