| Lister Horsefall Limited HVD | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £28,600 |
| Lismore Recruitment Consultants Limited | | | tax violations | 2020 | UK-HMRC | £46,827 |
| Lisa Brooks & Co Ltd ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £4,100 |
| Liquorstop Convenience Store | | | tax violations | 2021 | UK-HMRC | £57,862 |
| Liquid Fleet Ltd. | | | tax violations | 2021 | UK-HMRC | £205,125 |
| Lions Group Shop dba Lions Cub Nursery | | | tax violations | 2016 | UK-HMRC | £66,603 |
| Lionhead Property Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,850 |
| Lion Rock Properties And Let Tings Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,400 |
| Linxs First Choice Scaffolding Ltd | | | tax violations | 2019 | UK-HMRC | £51,219 |
| Linkerco Limited dba World Energy Link Limited | | | tax violations | 2017 | UK-HMRC | £22,885 |
| Link Fund Solutions | | | investor protection violation | 2024 | UK-FCA | £298,404,919 |
| Linear Investments Limited | | | investor protection violation | 2019 | UK-FCA | £409,300 |
| Linda Matthews & Co Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £3,725 |
| Lina Enterprises | | | tax violations | 2017 | UK-HMRC | £232,901 |
| Limbani Limited | | | tax violations | 2022 | UK-HMRC | £176,285 |
| Lighthouse Estate Agents Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £14,500 |
| Lighthouse Advisory Services Limited | | | investor protection violation | 2023 | UK-FCA | £23,610,000 |
| Liberty Motors | | | tax violations | 2022 | UK-HMRC | £12,040 |
| Libcus Limited | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £0 |
| Libby Libby | | | tax violations | 2018 | UK-HMRC | £43,846 |
| LGDK Technology Ltd | | | tax violations | 2023 | UK-HMRC | £139,443 |
| Lewis Partnership | | | mortgage abuses | 2011 | UK-FSA | £106,499 |
| Lewis Brownlee (Chichester) Limited | | | accounting fraud or deficiencies | 2022 | UK-ICAEW | £9,538 |
| Lewis Ballard BBB Limited | | | accounting fraud or deficiencies | 2023 | UK-ICAEW | £2,100 |
| Lewis & Co (SW London) Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £14,500 |
| Lever Drive Ltd | | | tax violations | 2018 | UK-HMRC | £14,479 |
| Lever Bros & Co | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £449 |
| Lettme Invest Limited (Heritage Property Sourcing Ltd) EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,200 |
| Lettings2sales Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £7,000 |
| Lettings Angels Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £14,500 |
| Leonard Curtis Recovery Limited | | | accounting fraud or deficiencies | 2023 | UK-ICAEW | £21,472 |
| Leon International Hong Kong Company Limited dba Gemini UK | | | tax violations | 2018 | UK-HMRC | £105,373 |
| Lemongrass Oriental Takeaway Ltd dba Lemon Grass | | | tax violations | 2018 | UK-HMRC | £79,544 |
| Leighton Paul Property Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,650 |
| Leighs Property Services | | | tax violations | 2018 | UK-HMRC | £19,712 |
| Leicestershire Living Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,762 |
| Leeds Accommodation Bureau EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,233 |
| Lebedev Ltd | | | tax violations | 2022 | UK-HMRC | £18,629 |
| Leatherhead Tops Pizza Ltd | | | tax violations | 2023 | UK-HMRC | £34,266 |
| Leaps & Bounds Ltd | | | tax violations | 2022 | UK-HMRC | £26,748 |
| Leaman Mattei Limited | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £27,101 |
| Le Forts | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £3,590 |
| Le Boutillier Estates Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £26,438 |
| LCD Solutions Ltd | | | tax violations | 2023 | UK-HMRC | £17,967 |
| LBF Advisory Limited AMP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £5,400 |
| LBC Estates Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £4,500 |
| LBBH LLC dba xpress beauty | | | tax violations | 2018 | UK-HMRC | £272,714 |
| LB Brasserie Ltd dba Left Bank Brasserie | | | tax violations | 2018 | UK-HMRC | £39,968 |
| Laxmi Jewellers UK Ltd | | | anti-money-laundering deficiencies | 2020 | UK-HMRC | £23,142 |
| Lawfords Consulting Limited | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £700 |
| Law Firm UK Ltd TCSP | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £1,000 |
| Laurfabi Ltd | | | tax violations | 2023 | UK-HMRC | £64,035 |
| Laura Roxana Ltd | | | tax violations | 2023 | UK-HMRC | £67,500 |
| Laughing Halibut Fish Bar | | | tax violations | 2019 | UK-HMRC | £29,097 |
| Latimer Restaurant Ltd dba Kushboo Restaurant | | | tax violations | 2020 | UK-HMRC | £63,581 |
| Latham Costa Limited | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £3,500 |
| Latham Costa Limited | | | accounting fraud or deficiencies | 2017 | UK-ICAEW | £1,000 |
| Lapis Business Services Limited ASP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £4,100 |
| Lanham & Francis | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £1,500 |
| Langley's Restaurant Ltd | | | tax violations | 2019 | UK-HMRC | £69,081 |
| Langdown Properties Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,050 |
| Lanes Exclusive Homes Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £5,800 |
| Lane Residential Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,750 |
| Lane Cottrell Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,800 |
| Landtex Limited | | | tax violations | 2021 | UK-HMRC | £109,904 |
| Landmark Sales and Lettings Ltd | | | anti-money-laundering deficiencies | 2020 | UK-HMRC | £5,250 |
| Landmark Property Sales Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,200 |
| Landmark Lettings Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £4,500 |
| Landestate.Co.Uk Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,062 |
| Landau Morley LLP | | | accounting fraud or deficiencies | 2022 | UK-ICAEW | £1,500 |
| Landau Baker Limited | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £1,988 |
| Lancasters (Accountants) Ltd | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £12,731 |
| Lamprell plc | | | investor protection violation | 2013 | UK-FSA | £2,428,300 |
| Laming Hope Residential Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £12,014 |
| Lamberts Estate Agents Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,500 |
| Lala Abdul Malik Khadam-Al-Hajjaj Ltd | | | tax violations | 2022 | UK-HMRC | £20,037 |
| Lakeside Cafe and Catering | | | tax violations | 2023 | UK-HMRC | £42,432 |
| Laing & Co Property Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £1,250 |
| Lahore Eastcote Trading Limited | | | tax violations | 2023 | UK-HMRC | £89,081 |
| Labour Wage Ltd | | | tax violations | 2019 | UK-HMRC | £17,892 |
| LAB Accounting and Consultancy Limited TCSP | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £1,500 |
| La Tazza Cafe Ltd | | | tax violations | 2018 | UK-HMRC | £27,099 |
| La Base Limited fka Nobleman Law Limited. | | | tax violations | 2022 | UK-HMRC | £23,912 |
| L'Oliveto Mazdour Limited dba L'Oliveto Rutland Ltd. | | | tax violations | 2018 | UK-HMRC | £47,197 |
| L UK Builders Ltd | | | tax violations | 2019 | UK-HMRC | £205,924 |
| L Hayes & Co. | | | tax violations | 2017 | UK-HMRC | £44,367 |
| L F Realty Ltd EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £1,000 |
| L A Haulage and Plant Hire Limited fka L A Plant Hire (UK) Limited | | | tax violations | 2016 | UK-HMRC | £114,566 |
| L & S Accounting Firm Umbrella Ltd | | | tax violations | 2024 | UK-HMRC | £2,074,840 |
| L & L Estates Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £11,792 |
| Kynisi Courier | | | tax violations | 2022 | UK-HMRC | £34,202 |
| Kungu Consulting Ltd ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £7,000 |
| Kunal Dry Cleaners Ltd | | | tax violations | 2018 | UK-HMRC | £41,486 |
| Kumbhayana Productions Limited. fka Film TMK Limited. | | | tax violations | 2023 | UK-HMRC | £2,546,508 |
| Kuku Hair & Beauty Limited | | | tax violations | 2021 | UK-HMRC | £41,360 |
| Kuavo Property Services Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £3,600 |
| KSC Construction Ltd | | | tax violations | 2018 | UK-HMRC | £15,225 |
| KSAS Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,500 |
| Krys Construction | | | tax violations | 2017 | UK-HMRC | £64,458 |
| Kronstadt Contractors Ltd | | | tax violations | 2022 | UK-HMRC | £113,148 |
| KRM Scaffold Services Ltd | | | tax violations | 2018 | UK-HMRC | £9,970 |
