| Leolyn Ltd | Rochester | 2020 |
| Leonora Borg Ltd | Colchester | 2017 |
| Leovest Human Care Limited | Basildon | 2023 |
| Lerry’S Enterprise Limited | Coventry | 2024 |
| LES Annie Holdings Ltd | London | 2024 |
| LES Lupins Limited | London | 2016 |
| Lessons 4 Life Limited | Hull | 2017 |
| Lestiko Recruitment Ltd | Cardiff | 2020 |
| LET Protect Ltd | Bowness-On-Windermere | 2024 |
| LET US Share the Care Residential Homes Ltd | Romford | 2022 |
| Let's DO Business (South East) Group Limited | Heathfield | 2010 |
| Letans Ltd | London | 2021 |
| Letbe Recruitment Ltd | Cardiff | 2020 |
| Lets DO Properties Limited | London | 2026 |
| Lets-Medc Ltd | London | 2025 |
| LEV LUV Intergrated Services Ltd | Gillingham | 2026 |
| LEVEL1 Consultancy and Training Limited | St. Ives | 2011 |
| Levinco Holdings Limited | London | 2021 |
| Lewis Fire Protection Ltd | Royal Victoria Docks | 2014 |
| Lewis Jackson Safety Ltd | Pontypool | 2025 |
| Lexicare Ltd | Liverpool | 2019 |
| Lexicon Fire Systems Limited | Hitchin | 1995 |
| Lexis Care Ltd | Birmingham | 2022 |
| Lexrae Support Ltd | Telford | 2020 |
| Lextin Care and Support Limited | Croydon | 2024 |
| Lexvu Ltd | London | 2018 |
| Lezac Limited | Bradford | 2023 |
| Lezar Finance Ltd | Newport | 2024 |
| LF Protection Limited | Coventry | 2023 |
| LG & CD Gidley Consultants Limited | | 2007 |
| LG Fire Ltd | Willenhall | 2014 |
| LH Medicolegal Ltd | Newcastle Upon Tyne | 2023 |
| LHM Safety Services Ltd. | Belfast | 2016 |
| LHS Fire Limited | Barnards Way Lowestoft | 2006 |
| LHW59 Ltd | Portsmouth | 2020 |
| LI LOW Ltd | Brighton | 2024 |
| Liaise Limited | Bournemouth | 2018 |
| Liam Flynn TM Ltd | Doncaster | 2025 |
| Liam Wallace TM Ltd | Doncaster | 2025 |
| Liberty Beauty Ltd | Coulsdon | 2023 |
| Liberty Fire Safety Scotland Ltd | Glasgow | 2022 |
| Liberty&Dignity Ltd | Midenhall | 2026 |
| Libronic Action Group Ltd | Manchester | 2021 |
| Libyson Limited | London | 2020 |
| Lieutenancy Services (West Midlands) Limited | Birmingham | 2001 |
| Life & Wellness Ltd | Uxbridge | 2025 |
| Life Angel Ltd | Birmingham | 2025 |
| Life Essence Global Ministries Community Interest Company | Bury St. Edmunds | 2019 |
| Life Favours Limited | Chadwell St Mary | 2019 |
| Life Safe Passive Fire & Compliance Ltd | Cockermouth | 2026 |
| Life Transforming Fitness CIC | Sutton Coldfield | 2024 |
| Life Transforming Services Ltd | London | 2025 |
| Life-Tree Healthcare Services Ltd | London | 2023 |
| Lifeline Agency Limited | Southampton | 2021 |
| Lifeline Fire and Safety Systems Limited | Coventry | 1994 |
| Lifeline Healthcare PVT Ltd. | Stoke-On-Trent | 2018 |
| Lifeline Universal Services Ltd | Aberdeen | 2025 |
| Lifelong Security and Cleaning Services Ltd | London | 2014 |
| Lifesafety Limited | Dunmow | 2005 |
| Lifesort Ltd | Chester | 2023 |
| Lifespring Consulting Ltd | Chelmsford | 2026 |
| Lifesteps CIC | London | 2025 |
| Lifestyle by Homecare Services (HCS) Ltd | Rossendale | 2017 |
| Lifestyle Medicine Accelerator Ltd | London | 2025 |
| Lightbulb Bespoke Care, Family Support & Consulting Services Ltd | Bedford | 2018 |
| Lighthouse Safety Solutions Limited | Ivybridge | 2025 |
| Lightshine Childrens Homes Ltd | Hatfield | 2019 |
| Lightwell Ltd | Fleet | 2025 |
| LIH Safety Solutions Ltd | Middlesbrough | 2023 |
| Like Health and Education Ltd | Leicester | 2017 |
| Lillyfield Care Ltd | London | 2023 |
| Lilomi | Richmond | 2018 |
| Lilysprings Limited | Darlington | 2022 |
| Lilyteeshealthcare Limited | Southend-On-Sea | 2023 |
| Lilyvalley Care Ltd | Milton Keynes | 2022 |
| LIM Education Ltd | Hayes | 2020 |
| Limbic Education CYF | Bridgend | 2024 |
| Lime Care Ltd | Rainham | 2021 |
| Lime Tree Associates Limited | Marston Magna | 2024 |
| Lime Tree Training Ltd | Pendle | 2020 |
| Limitless Potential Coaching & Mentoring CIC | Sheffield | 2026 |
| Limitless Support Services Ltd | Newquay | 2024 |
| Limitless TK Limited | Nottingham | 2023 |
| Lincoln City Centre Partnership | Lincoln | 2003 |
| Lincolnshire Safety Solutions Ltd | Grimsby | 2020 |
| Lincs Fire & Security Limited | Grimsby | 2016 |
| Lindsey Dyke Consultancy Limited | Kidderminster | 2025 |
| Linear Fire Consultants Ltd | Havant | 2024 |
| Linzwi Ltd | Tewkesbury | 2025 |
| Lion Change Management Limited | Wimborne | 2022 |
| Lion Fire Protection Ltd | Maidstone | 2024 |
| Lion Fire UK Limited | Surbiton | 2025 |
| Lioness Healthcare Professional Limited | Reading | 2022 |
| Lionheart in the Community Limited | London | 2009 |
| Lirurose Limited | Manchester | 2020 |
| Lisa Fairbrother Ltd | London | 2019 |
| Lisa Fowlie Health & Safety Consultants Ltd | Ty Croes | 2015 |
| Lisette Saunders Consulting Ltd | Barry | 2025 |
| Listenwell Alliance CIC | London | 2025 |
| LIT Foot Clinic Limited | Bolton | 2025 |