| Blades Leisure Limited | Sheffield | 2009 |
| Blaeb Holdings Limited | Barnsley | 2025 |
| Blaen Cefn Holdings Limited | Romford | 2021 |
| Blag Investments Limited | Stalybridge | 2017 |
| Blagden (Holdings) Limited | Westerham | 2013 |
| Blaggan Holdings Limited | Gravesend | 2023 |
| Blagper Holdings Limited | Ingatestone | 2026 |
| Blagrave Street Ventures Limited | Reading | 2014 |
| Blagrove Holdco Limited | Oxfordshire | 2025 |
| Blagrove Underwriting Agency Limited | Burford | 2001 |
| Blaguegate Holdings Limited | Skelmersdale | 2024 |
| Blainey Holdings Ltd | London | 2025 |
| Blair & Moon Investments Limited | Andover | 2025 |
| Blair Finance Services Limited | Huddersfield | 2011 |
| Blair Group Holdings Limited | Gloucester | 2026 |
| Blair Holding Company Ltd | Brierley Hill | 2010 |
| Blair Investment Group Limited | Cheltenham | 2026 |
| Blair Ventures Limited | London | 2024 |
| Blair Ward Holdings Ltd | London | 2025 |
| Blair-Sloan Capital Limited | London | 2020 |
| Blairbeth Consulting Ltd | Horsham | 2011 |
| Blairdenon Holdings Ltd | Grangemouth | 2023 |
| Blaired Holdings Ltd | Moira | 2023 |
| Blairish Holdings Ltd | Forfar | 2018 |
| Blairs Limited | Irvine | 2025 |
| Blairston Enterprises Limited | Glasgow | 2009 |
| Blaise (Bidco) Limited | London | 2020 |
| Blaise (Topco) Limited | London | 2020 |
| Blaj FIC Limited | Glasgow | 2019 |
| Blake and Day Financial Planning Limited | Felixstowe | 2019 |
| Blake Beardsley Limited | Leicester | 2024 |
| Blake Capital International Ltd | London | 2020 |
| Blake Design Group Ltd | Bradford | 2024 |
| Blake Envelopes Holdings Limited | Yeovil | 2024 |
| Blake Envelopes International Ltd | Yeovil | 2007 |
| Blake Finance Ltd | London | 2007 |
| Blake Financial Planning Ltd | Chelmsford | 2016 |
| Blake Group Holdings Ltd | Lochgelly | 2024 |
| Blake Group Services Limited | Southend-On-Sea | 2024 |
| Blake House Holdings Limited | York | 2020 |
| Blake Mortgage and Protection Services Ltd | Bushey | 2018 |
| Blake Partnership Group Ltd | Kington | 2024 |
| Blake Property Services Holdings Ltd | Peterborough | 2026 |
| Blake Redrup Consulting Limited | Bishop'S Stortford | 2024 |
| Blake Terry Holdings Ltd | Ipswich | 2020 |
| Blake Ventures Ltd | London | 2023 |
| Blakeana Holdings Ltd | Essex | 2026 |
| Blakeberry Holdings Limited | London | 2017 |
| Blakebrooke Financial Advice Ltd | Nottingham | 2020 |
| Blakedew 840 Limited | Cardiff | 2020 |
| Blakedew 841 Limited | Cardiff | 2020 |
| Blakedown Holdings Ltd | Birmingham | 2020 |
| Blakedown Properties Ltd | Kidderminster | 2026 |
| Blakeleigh Assets Ltd | Norwich | 2025 |
| Blakeley Holdings Limited | Salisbury | 2026 |
| Blakemore Holdings Ltd | Solihull | 2024 |
| Blakeney Homes Holdings Limited | Milton Keynes | 2023 |
| Blakeney Leigh Group Ltd | London | 2021 |
| Blakeney Majekodunmi Holdings Limited | London | 2025 |
| Blakenham Finance Limited | Wilmslow | 1994 |
| Blakes Fields Ltd | Cheltenham | 2026 |
| Blakes Financial Management Limited | Aylesbury | 2012 |
| Blakes Investments Limited | New Malden | 2025 |
| Blakes Lane Capital Ltd | New Malden | 2023 |
| Blakeside Holdings Limited | Exeter | 2024 |
| Blakesley Holdings Limited | London | 2020 |
| Blakethwaite Limited | Bingham | 2011 |
| Blaketorre Limited | London | 2025 |
| Blakeway & Hunt Limited | Gloucester | 1998 |
| Blakewell Ltd | Stroud | 2022 |
| Blakey Holdings Ltd | Ely | 2018 |
| Blakrock Utajiri Ltd | London | 2025 |
| Blakron Holdings Limited | Woodford Green | 2025 |
| Blameless Claims Ltd | Glasgow | 2025 |
| Blammo! Ltd | Wymondham | 2023 |
| Blamphayne Sawmill Holdings Limited | Honiton | 2024 |
| Blanc Finance Limited | Croydon | 2026 |
| Blanc Living Holdings Ltd | London | 2026 |
| Blanc Property Finance Limited | Wakefield | 2021 |
| Blancco (Software) Services Limited | Bishop’S Stortford | 2014 |
| Blanchard Wells (Holdings) Limited | Southampton | 2001 |
| Blanchards Holdings Ltd | Ramsgate | 2025 |
| Blanche Asset Management Limited | London | 2026 |
| Blanco Wealth Management Limited | Loughborough | 2017 |
| Blancomet Scot Holdco Limited | Dunfermline | 2024 |
| Blancote Limited | West Drayton | 2022 |
| Blancs Management Group Limited | Wrotham | 2026 |
| Bland Holdings Limited | Altrincham | 2025 |
| Bland Investments Ltd | Leamington Spa | 2024 |
| Blandford RS Limited | Poole | 2022 |
| Blandfords Group Limited | Aldershot | 2019 |
| Blanding Holdings Limited | Cambridge | 2021 |
| Blandings Holdings Limited | Leigh On Sea | 2021 |
| Blandsco Limited | York | 2019 |
| Blandygam Holdings Limited | Sheffield | 2026 |
| Blaney & Boyd Financial Services Ltd | Prescot | 2012 |
| Blanford Capital Limited | London | 2025 |
| Blank Canvas Mortgages Limited | Livingston | 2025 |
| Blank Cheque Holdings Ltd | Sevenoaks | 2022 |
| Blankfactor Group Holdings Limited | London | 2022 |