| LEO Tiger Trade Ltd | Manchester | 2022 |
| Leodis Drainage Solutions Ltd | Leeds | 2024 |
| LES Reed Clearance Services Ltd | Sheerness | 2012 |
| Less Mess Ltd | Ilfracombe | 2003 |
| LESS2BUILDIT UK Ltd | Horsham | 2015 |
| Lesswasteservices Ltd | Manchester | 2025 |
| LET US Recycle Ltd | Glasgow | 2019 |
| Let's Maintain (York) Ltd | York | 2017 |
| Let's Skip the Skip CIC | Glasgow | 2026 |
| Letbudget Limited | London | 2020 |
| Lets Go Waste Broker Ltd | Sutton | 2026 |
| Lets Recycle IT Limited | Armagh | 2015 |
| Lets Sell Property Services Ltd | Inverness | 2024 |
| Lets Talk Rubbish Waste Management and Maintenance Solutions Ltd | Princes Risborough | 2024 |
| Levante Energy Group Ltd | Brighton | 2017 |
| Levenseat Ltd. | Glasgow | 1985 |
| Levenseat Recycling Limited | South Lanarkshire | 2005 |
| Levenseat Resource Management Limited | Lanark | 2025 |
| Leverton Environmental Services Limited | Nottingham | 2009 |
| Levington Resources Limited | Yarm | 2017 |
| Lewis & Co Moving Group Ltd | Wrexham | 2026 |
| Lewis Logistical Solutions Ltd | Newbury | 2026 |
| Lewis Rawlings Ltd | Newbury | 2005 |
| Lewis Weir Waste Management Limited | Harpenden | 2014 |
| Lewjet Ltd | Wickford | 2024 |
| LEX Hygiene Ltd | Doncaster | 2016 |
| Lexa Waste Management Limited | Orpington | 2025 |
| LFB Vehicle Recovery Ltd | Ashbourne | 2026 |
| LFD Group London Limited | Dartford | 2025 |
| LFH Waste Company Limited | London | 2023 |
| LG Environmental Services Ltd | Doncaster | 2025 |
| LG German Autos Ltd | Chesterfield | 2021 |
| LG Metals Ltd | Manchester | 2018 |
| Lg&P Limited | Romsey | 2008 |
| LGB Utilities Ltd | Chelmsford | 2012 |
| LGC Waste Management Limited | Leamington Spa | 2018 |
| LGW Waste Solutions Ltd | Stoke-On-Trent | 2025 |
| LH Clearances Ltd | Waltham Cross | 2022 |
| LH Recycling Ltd | Derby | 2025 |
| LH Waste & Skip Hire Ltd | Liverpool | 2024 |
| Liam Leigh Drainage Ltd | Chorley | 2025 |
| Lib-Erty Recycling Solutions Limited | Wilmslow | 2024 |
| Libatt Recycling Ltd | Wolverhampton | 2021 |
| Liberaqua Limited | London | 2025 |
| Liberate Recycling Limited | Bootle | 2018 |
| Liberty Contracts Ltd | Londonderry | 2009 |
| Liberty Tyre Recycling Ltd | Oldham | 2026 |
| Libra Utility Services Ltd | Chatham | 2021 |
| Licensed to Clear Limited | Nottingham | 2025 |
| Licensed Tyre Disposals Limited | Bradford | 2008 |
| Lichen Renewal Limited | High Wycombe | 2010 |
| Lichfield Drain Solutions Limited | Lichfield | 2009 |
| Lichfield Pet Cremations Ltd | Lichfield | 2025 |
| Lidsey Landfill Limited | Maidenhead | 1988 |
| Liene & Edgars Ltd | Bilston | 2025 |
| Lifecycle Asset Management Limited | Manchester | 2024 |
| Lifecycle Group Holdings Limited | Manchester | 2024 |
| Lifecycle Oils Ltd | Brighton | 2018 |
| Lifecycle Tech Limited | Taunton | 2023 |
| Lift & Shift 1664 Ltd | Wimborne | 2025 |
| Lift & Shift Factory & Plant Limited | Haywards Heath | 2005 |
| Liftaway Solutions Ltd | London | 2025 |
| Lifted Group Limited | Hayes | 2022 |
| Light Waste and Building Services Ltd | Caerdydd | 2026 |
| Lightbown Environmental Limited | St. Asaph | 2012 |
| Lighthouse Secure Solutions Limited | Kingswinford | 2020 |
| Lightning Recycling Ltd | Slough | 2020 |
| Lili Waste Management Limited | Tonbridge | 2023 |
| Lili Waste Services Ltd | Tonbridge | 2014 |
| Lilla Lawns and Landscaping Ltd | Clydebank | 2023 |
| Lilla Waste Solutions Ltd | Clydebank | 2025 |
| Lilliput Waste Disposal Ltd | Grimsby | 2019 |
| Lily Aqua Essex Limited | Colchester | 2025 |
| Lime Green Hygiene Ltd | London | 2014 |
| Limehouse Group Ltd | Royal Tunbridge Wells | 2025 |
| Limes Farm Reservoir Ltd | Norwich | 2026 |
| Limitless Delivery Ltd | Preston | 2019 |
| Limitless Group Fife Limited | Leven | 2024 |
| Limitless Hygiene Group Ltd | Poole | 2025 |
| Limitless Waste Management Ltd | Leven | 2025 |
| Limpio Storage Solutions Ltd | Crawley | 2006 |
| Lincoln Protein Holdings Ltd | Long Bennington | 2015 |
| Lincoln Proteins Limited | Long Bennington | 1997 |
| Lincoln Storm Ltd | Weston-Super-Mare | 2021 |
| Lincoln Water Transfer Limited | Lincoln | 2000 |
| Lincolnshire Tyre Collections Ltd | Boston | 2023 |
| Lincs Eco Group Ltd | Scunthorpe | 2026 |
| Lincs Recycling (2024) Ltd | Lincoln | 2024 |
| Lincwaste Limited | Doncaster | 1991 |
| Linden Environmental Consultancy Ltd | Rotherham | 2023 |
| Linea Water Solutions Ltd | Andover | 2026 |
| Ling Metals Limited | Canterbury | 1988 |
| Ling Waste Recycling Limited | Canterbury | 2014 |
| Lining Sector Limited | Epsom | 2012 |
| Lining Solutions Ltd | Bolton | 2025 |
| Link Polymers Ltd | Liverpool | 2014 |
| Link Recycling Limited | Bolton | 2015 |
| LINK2LONDON Ltd | Uxbridge | 2014 |
| Linked Estates UK Limited | Neath | 2015 |
| Links Plastic and Recycling Solutions Ltd | Doncaster | 2019 |