| Bloomsbury Boats Limited | Cirencester | 2013 |
| BLOPES26 Ltd | Leicester | 2026 |
| Blossom Logistics Limited | London | 2020 |
| Blossom Services International Ltd | West Drayton | 2025 |
| Blossom Skye Limited | Manchester | 2016 |
| Blossom Valley Care Ltd | Southampton | 2015 |
| Blossomed Travel and Security Services Ltd | Harlow | 2026 |
| Blossoming Maritime Ltd | London | 2013 |
| Blossomnation Limited | Enfield | 2023 |
| Blotudcar Ltd | Northampton | 2022 |
| Blowfish Holdings Limited | Stockport | 2024 |
| Blox Poynt Ltd | Southampton | 2025 |
| Bloxham Tipping Services Ltd | Norwich | 2014 |
| Bloxwich Potatoes Limited | Bloxwich Nr Walsall | 1990 |
| Bloxwich Radio Taxis Limited | Nottingham | 2018 |
| Blpa Solutions Limited | Bolton | 2025 |
| BLR Delivery Ltd | Wellingborough | 2018 |
| BLR Haulage Ltd | Beckenham | 2024 |
| BLR Logistics Ltd | Tilbury | 2026 |
| BLR Transport Ltd | Ashford | 2025 |
| BLS Aviation Ltd | Billingshurst | 2025 |
| BLS FAC Ltd | Glasgow | 2025 |
| BLS Logistics Ltd | Rugby | 2024 |
| Blss Ltd. | Kennington | 2017 |
| BLT (SW) Ltd | St. Austell | 2018 |
| BLT Contracts Limited | Newcastle Upon Tyne | 2021 |
| BLU Iris Trans Ltd | Preston | 2020 |
| BLU Logistics Limited | London | 2016 |
| BLU Point Logistics Limited | Nottingham | 2024 |
| BLU Skies Ltd | Chichester | 2013 |
| BLU TEQ PVT Ltd | London | 2024 |
| BLU V Haulage Ltd | London | 2024 |
| Bluapple Limited | Thornhill | 2002 |
| Blue & Green Oval Services Limited | Kettering | 2003 |
| Blue Airport Transfer Ltd | London | 2026 |
| Blue Alliance Consulting Ltd | London | 2023 |
| Blue Anchor International UK Limited | Harrow | 2025 |
| Blue Apex Limited | Hinckley | 2006 |
| Blue Apron Transport Limited | London | 1995 |
| Blue Arctic Ltd | Slough | 2017 |
| Blue Arrow Executive Car Service Limited | London | 2013 |
| Blue Arrow Express Limited | Birmingham | 2025 |
| Blue Arrow Gatwick Ltd | Redhill | 2012 |
| Blue Arrow Trans Ltd | Widnes | 2020 |
| Blue Aviation UK Ltd | London | 2020 |
| Blue BAG Distribution Ltd | Bedford | 2017 |
| Blue Balloon Resources Ltd | London | 2025 |
| Blue Bear Storage & Distribution Ltd | Leicester | 2022 |
| Blue Bear Transport Ltd | Lutterworth | 2020 |
| Blue Bell Shipping UK Ltd | London | 2020 |
| Blue Bells U.K Ltd | London | 2024 |
| Blue Bentley Limited | Yeovil | 2022 |
| Blue Block Limited | Maldon | 2025 |
| Blue Box Holdings Ltd | Clydebank | 2025 |
| Blue Box Self Storage and Warehousing Limited | Barnstaple | 2016 |
| Blue Box Selfstore Limited | Eastbourne | 2016 |
| Blue Box Storage (Hull) Limited | York | 2024 |
| Blue BUS Limited | Allanton | 2004 |
| Blue Carbon Removal Services Ltd | London | 2019 |
| Blue Cargo Ltd | Manchester | 2019 |
| Blue Carriers Ltd | Plymouth | 2018 |
| Blue Chain Shackle Trucking Ltd. | Alreford | 2018 |
| Blue Charter Boats Ltd | London | 2022 |
| Blue Cherry Limited | Pontypool | 2025 |
| Blue Chip Corporate Chauffeurs Ltd | Cardiff | 2019 |
| Blue Circle Express Ltd | Basildon | 2016 |
| Blue Circle Inc Limited | Watford | 2018 |
| Blue Circle Trans Ltd | Telford | 2018 |
| Blue City Aviation Group Limited | Birmingham | 2008 |
| Blue City Aviation Limited | Birmingham | 2004 |
| Blue Cloud Aero Services Ltd | Shipston-On-Stour | 2026 |
| Blue Connect Limited | Feltham | 2007 |
| Blue Corner Cars Ltd | Wellingborough | 2010 |
| Blue Courier Ltd | Chatham | 2016 |
| Blue Crate Transport Ltd | Preston | 2025 |
| Blue Crown Storage Ltd | Wetherby | 2024 |
| Blue Diamond Corporation Ltd | Coventry | 2018 |
| Blue Diamond Hot TUB Care Ltd | Poole | 2025 |
| Blue Diamond Logistics and Recruitment Ltd | Ilford | 2024 |
| Blue Diamond Transport Ltd | Ashton Under Lyne | 2021 |
| Blue Dinosaur Limited | Bridgwater | 2014 |
| Blue Dog Express Couriers Ltd | Derby | 2025 |
| Blue Dolphin Express Limited | Bury St. Edmunds | 2025 |
| Blue Dolphin Leisure Limited | Penzance | 2001 |
| Blue Door Cars Limited | Worcestershire | 2006 |
| Blue Door Logistics Limited | Worcestershire | 1999 |
| Blue Dragon Recovery & Transport Ltd | Birmingham | 2025 |
| Blue Eagle Enterprise Limited | Ilford | 2024 |
| Blue Earth Environmental Solutions Ltd | Derby | 2026 |
| Blue Earth Travel Ltd | Solihull | 2025 |
| Blue Ensign Limited | Fareham | 2005 |
| Blue Express Courier Limited | Luton | 2023 |
| Blue Express Limited | Salford | 2024 |
| Blue Fenix Ltd | London | 2004 |
| Blue FIN International Shipping Limited | Sutton | 2021 |
| Blue Flag Accident Management Limited | Salford | 1998 |
| Blue FOX Services Ltd | Oldbury | 2022 |
| Blue FOX Transport Limited | Peterborough | 2005 |
| Blue Freight Forwarder Ltd | London | 2015 |
| Blue Funnel Cruises Limited | Southampton | 1993 |