| Leon International Hong Kong Company Limited dba Gemini UK | | | tax violations | 2018 | UK-HMRC | £105,373 |
| Leonard Curtis Recovery Limited | | | accounting fraud or deficiencies | 2023 | UK-ICAEW | £21,472 |
| Lettings Angels Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £14,500 |
| Lettings2sales Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £7,000 |
| Lettme Invest Limited (Heritage Property Sourcing Ltd) EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,200 |
| Lever Bros & Co | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £449 |
| Lever Drive Ltd | | | tax violations | 2018 | UK-HMRC | £14,479 |
| Lewis & Co (SW London) Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £14,500 |
| Lewis Ballard BBB Limited | | | accounting fraud or deficiencies | 2023 | UK-ICAEW | £2,100 |
| Lewis Brownlee (Chichester) Limited | | | accounting fraud or deficiencies | 2022 | UK-ICAEW | £9,538 |
| Lewis Partnership | | | mortgage abuses | 2011 | UK-FSA | £106,499 |
| LGDK Technology Ltd | | | tax violations | 2023 | UK-HMRC | £139,443 |
| Libby Libby | | | tax violations | 2018 | UK-HMRC | £43,846 |
| Libcus Limited | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £0 |
| Liberty Motors | | | tax violations | 2022 | UK-HMRC | £12,040 |
| Lighthouse Advisory Services Limited | | | investor protection violation | 2023 | UK-FCA | £23,610,000 |
| Lighthouse Estate Agents Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £14,500 |
| Limbani Limited | | | tax violations | 2022 | UK-HMRC | £176,285 |
| Lina Enterprises | | | tax violations | 2017 | UK-HMRC | £232,901 |
| Linda Matthews & Co Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £3,725 |
| Linear Investments Limited | | | investor protection violation | 2019 | UK-FCA | £409,300 |
| Link Fund Solutions | | | investor protection violation | 2024 | UK-FCA | £298,404,919 |
| Linkerco Limited dba World Energy Link Limited | | | tax violations | 2017 | UK-HMRC | £22,885 |
| Linxs First Choice Scaffolding Ltd | | | tax violations | 2019 | UK-HMRC | £51,219 |
| Lion Rock Properties And Let Tings Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,400 |
| Lionhead Property Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,850 |
| Lions Group Shop dba Lions Cub Nursery | | | tax violations | 2016 | UK-HMRC | £66,603 |
| Liquid Fleet Ltd. | | | tax violations | 2021 | UK-HMRC | £205,125 |
| Liquorstop Convenience Store | | | tax violations | 2021 | UK-HMRC | £57,862 |
| Lisa Brooks & Co Ltd ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £4,100 |
| Lismore Recruitment Consultants Limited | | | tax violations | 2020 | UK-HMRC | £46,827 |
| Lister Horsefall Limited HVD | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £28,600 |
| Litchfield Development 7 Ltd | | | tax violations | 2023 | UK-HMRC | £119,401 |
| Litchfield Holdings Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £11,200 |
| Liu Jian Ltd dba Suk Suran Fine Cuisine | | | tax violations | 2019 | UK-HMRC | £49,148 |
| Liu Tang Ltd dba Sukho Fine Thai Cuisine | | | tax violations | 2019 | UK-HMRC | £98,302 |
| Livingwell Realties Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,750 |
| LJ Barling Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £2,412 |
| LJ Financial Planning Ltd. | | | investor protection violation | 2020 | UK-FCA | £107,200 |
| LJT Limited dba Suk Fine Cuisine | | | tax violations | 2019 | UK-HMRC | £49,148 |
| LL (NI) Limited dba Mandarin Palace Restaurant dba Mandarin Palace Takeaway dba Karma Tapas Bar dba Jasmine Takeaway | | | tax violations | 2016 | UK-HMRC | £530,315 |
| Lloyd Williams Search And Select Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £4,300 |
| Lloyds Bank Corporate Markets Plc | Lloyds Banking Group | financial services | anti-money-laundering deficiencies | 2022 | UK-JFSC | £498,000 |
| Lloyds Bank plc and Bank of Scotland plc | Lloyds Banking Group | financial services | investor protection violation | 2013 | UK-FCA | £28,038,800 |
| Lloyds Bank plc and Bank of Scotland plc and The Mortgage Business plc | Lloyds Banking Group | financial services | mortgage abuses | 2020 | UK-FCA | £64,046,800 |
| Lloyds Banking Group | Lloyds Banking Group | financial services | interest rate benchmark manipulation | 2014 | UK-PRA | £7,760,000 |
| Lloyds Banking Group | Lloyds Banking Group | financial services | banking violation | 2021 | UK-CMA | £0 |
| Lloyds Banking Group | Lloyds Banking Group | financial services | banking violation | 2021 | UK-CMA | £0 |
| Lloyds Banking Group plc | Lloyds Banking Group | financial services | banking violation | 2020 | UK-CMA | £0 |
| Lloyds Management Limited | | | tax violations | 2014 | UK-HMRC | £92,124 |
| Lloyds Property Group Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £15,000 |
| Locum | | | tax violations | 2022 | UK-HMRC | £55,673 |
| Loft Professionals Limited | | | tax violations | 2022 | UK-HMRC | £34,539 |
| Loganberry | | | tax violations | 2020 | UK-HMRC | £58,969 |
| Logwooden Investments Ltd | | | tax violations | 2021 | UK-HMRC | £346,682 |
| Lomas and Company Accountants Limited | | | accounting fraud or deficiencies | 2024 | UK-ICAEW | £13,559 |
| London Demolition (UK) Ltd | | | tax violations | 2017 | UK-HMRC | £46,778 |
| London Designer Sales Ltd | | | tax violations | 2022 | UK-HMRC | £16,079 |
| London Fast Food Developments Ltd | | | tax violations | 2016 | UK-HMRC | £157,983 |
| London Football League Ltd | | | tax violations | 2016 | UK-HMRC | £6,863 |
| London House Hunters Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,596 |
| London Lease Ltd | | | tax violations | 2020 | UK-HMRC | £27,336 |
| London Lettings & Sales Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £4,750 |
| London Property Acquisition Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £5,000 |
| London Wall Property Services Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,750 |
| London Waterloo Hostel | | | tax violations | 2018 | UK-HMRC | £124,403 |
| Londons Lofts & Extensions Ltd | | | tax violations | 2018 | UK-HMRC | £23,377 |
| Lone Star Pizza Ltd | | | tax violations | 2021 | UK-HMRC | £65,033 |
| Longacre (Bristol) Ltd | | | tax violations | 2021 | UK-HMRC | £55,706 |
| Longstar Estates (London) Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £4,100 |
| Lord Line Campus Limited | | | tax violations | 2020 | UK-HMRC | £24,362 |
| Lordgate Ltd | | | tax violations | 2016 | UK-HMRC | £56,553 |
| Louise Black Real Estate Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £1,250 |
| Louvre Fund Services Limited | | | investor protection violation | 2020 | UK-GFSC | £77,000 |
| Louvre Fund Services Limited | | | investor protection violation | 2016 | UK-GFSC | £42,000 |
| Louvre Trust (Guernsey Limited) | | | anti-money-laundering deficiencies | 2019 | UK-GFSC | £70,000 |
| Love Homes Estate Agents Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £7,000 |
| Love Lane Brewery Ltd | | | tax violations | 2024 | UK-HMRC | £38,226 |
| Lovecamelone MCR Ltd dba Camel One | | | tax violations | 2023 | UK-HMRC | £28,494 |
| Low Grange Quarry Ltd | | | tax violations | 2019 | UK-HMRC | £42,401 |
| Loyal Properties International Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £3,200 |
| Lucky Dairy Ltd | | | tax violations | 2021 | UK-HMRC | £1,317,433 |
| Luna Stand Ltd | | | tax violations | 2024 | UK-HMRC | £28,226 |
| Luxury Suburbia Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £10,500 |
| M & G Property Development and Maintenance Ltd | | | tax violations | 2018 | UK-HMRC | £542,378 |
| M & M (Cambridge) LLP | | | tax violations | 2021 | UK-HMRC | £720,900 |
| M & N Accountancy Services Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,450 |
| M and M (MCR) Limited dba Rice | | | tax violations | 2017 | UK-HMRC | £47,818 |
| M B Removals | | | tax violations | 2018 | UK-HMRC | £170,013 |
| M Berry Caravans Ltd HVD | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £14,200 |
| M H Building Services | | | tax violations | 2019 | UK-HMRC | £19,172 |
| M M UK | | | tax violations | 2018 | UK-HMRC | £60,165 |
| M P Pizza Ltd | | | tax violations | 2019 | UK-HMRC | £61,786 |
| M Rodgerson Roofing Ltd | | | tax violations | 2023 | UK-HMRC | £9,415 |
| M Sure Win Limited (Formerly trading as ‘China Star’) | | | tax violations | 2023 | UK-HMRC | £91,074 |
| M&G Taxation Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £5,500 |
| M&M (UK) Limited | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £0 |
| M&S Groundworks Ltd | | | tax violations | 2017 | UK-HMRC | £14,352 |
| M&S Services 4 You Limited | | | tax violations | 2022 | UK-HMRC | £16,685 |
| M.B.P Technical Services Limited | | | tax violations | 2018 | UK-HMRC | £22,933 |
| M.C.L. Transport Ltd | | | tax violations | 2017 | UK-HMRC | £26,650 |
