| Weston Homes plc | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Weston Homes plc | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westoaks Builders Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Westmoreland Mechanical Testing & Research Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Westminster Waste Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Westminster Tutors | | | childcare and educational services violation | 2023 | UK-OFSTED | £0 |
| Westminster Building Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Westmasters Ltd | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westley Plastics Limited | | | workplace safety or health violation | 2013 | UK-HSE | £11,407 |
| Westley Group Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westley Group Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westley Group Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westley Engineering Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Westley Engineering Limited | | | workplace safety or health violation | 2011 | UK-HSE | £8,186 |
| Westleigh Partnerships Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Westleigh Partnerships Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Westlands Construction Ltd | | | workplace safety or health violation | 2015 | UK-HSE | £16,847 |
| Westland Horticulture Limited | | | workplace safety or health violation | 2024 | UK-HSENI | £130,000 |
| Westland Horticulture Garden Health | | | workplace safety or health violation | 2020 | UK-HSENI | £0 |
| Westland Horticulture Garden Health | | | workplace safety or health violation | 2020 | UK-HSENI | £0 |
| Westhead Welding Fabricators Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westhead Welding Fabricators Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westhead Welding Fabricators Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westgrove Joinery | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| Westgrove Joinery | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| Westgrove Joinery | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| Westgate Construction (Hertford) Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Westgate Construction (Hertford) Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Westfield Shoppingtowns Ltd | | | workplace safety or health violation | 2013 | UK-HSE | £11,248 |
| Westfield School | | | childcare and educational services violation | 2017 | UK-OFSTED | £0 |
| Westfield Medical Ltd | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Westfield Medical Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westfield Medical Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Western Well Tool Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Western Welding & Engineering Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Welding & Engineering Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Welding & Engineering Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Welding & Engineering Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Welding & Engineering Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Welding & Engineering Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Welding & Engineering Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Welding & Engineering Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Welding & Engineering Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Trading Limited | | | workplace safety or health violation | 2020 | UK-HSE | £0 |
| Western Skip Hire Limited | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| Western Sign Systems Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Western Sign Systems Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Western Sign Systems Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Western Power Transmissions Ltd | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Western Power Transmissions Ltd | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Western Power Transmissions Ltd | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Western Power Distribution (South West) plc | National Grid | utilities and power generation | workplace safety or health violation | 2013 | UK-HSE | £913,115 |
| Western Power Distribution (South Wales) plc | National Grid | utilities and power generation | workplace safety or health violation | 2021 | UK-HSE | £0 |
| Western Power Distribution (South Wales) plc | National Grid | utilities and power generation | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Power Distribution (South Wales) plc | National Grid | utilities and power generation | workplace safety or health violation | 2011 | UK-HSE | £318,179 |
| Western Park Leicester Ltd | | | workplace safety or health violation | 2012 | UK-HSE | £135,000 |
| Western Mechanical Handling (UK) Ltd | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Mechanical Handling (UK) Ltd | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Mechanical Handling (UK) Ltd | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Mechanical Handling (UK) Ltd | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Mechanical Handling (UK) Ltd | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Mane Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Western Mane Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Western Lion Limited | | | workplace safety or health violation | 2016 | UK-HSE | £0 |
| Western Lion Limited | | | workplace safety or health violation | 2016 | UK-HSE | £0 |
| Western Flat Roofing Company Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Flat Roofing Company Limited | | | workplace safety or health violation | 2016 | UK-HSE | £0 |
| Western Expanded Metal Industries Co Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Expanded Metal Industries Co Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Expanded Metal Industries Co Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Western Airducts (UK) Ltd | | | workplace safety or health violation | 2016 | UK-HSE | £0 |
| Westend Roofing Ltd | | | workplace safety or health violation | 2016 | UK-HSE | £0 |
| Westend Glass & Glazing Ltd. | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| Westend Glass & Glazing Ltd. | | | workplace safety or health violation | 2023 | UK-HSE | £0 |
| Westend Cladding & Joinery Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Westend Cladding & Joinery Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Westend Cladding & Joinery Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| WESTDOWN PLANT LTD | | | workplace safety or health violation | 2023 | UK-HSENI | £0 |
| WESTDOWN PLANT LTD | | | workplace safety or health violation | 2023 | UK-HSENI | £0 |
| WESTDOWN PLANT LTD | | | workplace safety or health violation | 2023 | UK-HSENI | £0 |
| WESTDOWN PLANT LTD | | | workplace safety or health violation | 2023 | UK-HSENI | £0 |
| WESTDOWN PLANT LTD | | | workplace safety or health violation | 2023 | UK-HSENI | £0 |
| WESTDOWN PLANT LTD | | | workplace safety or health violation | 2023 | UK-HSENI | £0 |
| Westdale Services Limited | | | workplace safety or health violation | 2019 | UK-HSE | £182,310 |
| Westdale Services Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Westcut Engineering Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Westcountry Stonemasons Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Westcountry Property Management Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Westcountry Property Limited | | | workplace safety or health violation | 2019 | UK-HSE | £0 |
| Westcon Products Ltd. | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Westcon Products Ltd. | | | workplace safety or health violation | 2016 | UK-HSE | £0 |
| Westcon Products Ltd. | | | workplace safety or health violation | 2016 | UK-HSE | £0 |
| Westcon Products Ltd. | | | workplace safety or health violation | 2016 | UK-HSE | £0 |
| Westcombe Group Limited | | | workplace safety or health violation | 2024 | UK-HSE | £0 |
| Westchurch Homes Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Westchurch Homes Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Westchurch Homes Limited | | | workplace safety or health violation | 2018 | UK-HSE | £0 |
| Westbury Packaging Limited | | | workplace safety or health violation | 2017 | UK-HSE | £0 |
| Westbury Filtermation Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westbury Filtermation Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
| Westbury Filtermation Limited | | | workplace safety or health violation | 2022 | UK-HSE | £0 |
