| Blue Shark Charters Limited | Haverfordwest | 2013 |
| Blue Side UP Ltd | Diss | 2022 |
| Blue Skies ATM Consulting Ltd | Ipswich | 2019 |
| Blue Skies Aviation Ltd | Poole | 2024 |
| Blue Skies Logistics Limited | Sandbach | 2025 |
| Blue Skies Training Limited | Wolverhampton | 2015 |
| Blue Sky 20 Ltd | Harlow | 2020 |
| Blue Sky Applications Limited | Steyning | 2002 |
| Blue Sky Cabs Ltd | Ipswich | 2025 |
| Blue Sky Charters (Mallorca) Limited | Northallerton | 2007 |
| Blue Sky Chauffeur Services Limited | Liverpool | 2018 |
| Blue Sky Global Solutions Limited | Stratford Upon Avon | 2006 |
| Blue Sky Haulage Limited | Romford | 2021 |
| Blue Sky Holiday Travel Agency Limited | London | 2025 |
| Blue Sky J5 Ltd | Hounslow | 2019 |
| Blue Sky Logistics Ltd | London | 2020 |
| Blue Sky Marine Services Ltd | Whitwick | 2025 |
| Blue Sky One Limited | London | 2006 |
| Blue Sky Radio Cars Ltd | Smethwick | 2012 |
| Blue Sky Scot Ltd | Aberdeen | 2023 |
| Blue Space Self Storage Ltd | Liskeard | 2019 |
| Blue Spedition Ltd | Runcorn | 2020 |
| Blue Spire Cargo Ltd | Chester | 2025 |
| Blue Star Airport Transfers Ltd. | Hayes | 2025 |
| Blue Star Cars Limited | Staines-Upon-Thames | 2006 |
| Blue Star Couriers Ltd | Reading | 2025 |
| Blue Star Express Logistics Limited | Consett | 2010 |
| Blue Star Jets UK Limited | Maidstone | 2012 |
| Blue Star Ocean Ltd | Manchester | 2025 |
| Blue Star Parcels Ltd | London | 2026 |
| Blue Star Support Limited | Street | 2024 |
| Blue Star Taxis (Kendal) Limited | Kendal | 2008 |
| Blue Star Taxis Limited | | 1986 |
| Blue Star Transport Ltd | Enfield | 2020 |
| Blue Star Worldwide Limited | Slough | 2018 |
| Blue Thunder Group Ltd | Ivybridge | 2020 |
| Blue Thunder RIB Rides Ltd | St. Ives | 2019 |
| Blue Ticks Logistics Limited | Iver | 2019 |
| Blue Tiger Logistics Ltd | Colchester | 2024 |
| Blue Tomy Cargo Ltd | Evesham | 2026 |
| Blue Transport Ltd | West Horndon | 2024 |
| Blue Transport Solutions Ltd | London | 2025 |
| Blue Triangle Training Limited | Birmingham | 2016 |
| Blue Trip Private Hire Ltd | Blackburn | 2026 |
| Blue Visby Services Limited | London | 2021 |
| Blue Visby Worldwide Systems Limited | London | 2021 |
| Blue Water Freight Limited | Ilford | 2013 |
| Blue Water Logistics UK Limited | Manchester | 2012 |
| Blue Water Shipping UK Limited | Manchester | 2011 |
| Blue Wave Imports Ltd | London | 2025 |
| Blue Wave Shipping Limited | Staines-Upon-Thames, | 2016 |
| Blue Waves Travelling Ltd | Waterlooville | 2025 |
| Blue Whale Logistics Limited | Enderby | 2007 |
| Blue Wild Limited | North Berwick | 2016 |
| Blue Wing Limited | Cheltenham | 1975 |
| Blue Wings Logistics Ltd | London | 2025 |
| Blue World Ltd | Accrington | 2025 |
| Blue World Paragliding Ltd | Maryport | 2021 |
| Blue Yellow Ltd | South Ockendon | 2017 |
| Blue Yonder Investments Limited | Bargoed | 2011 |
| BLUE8 Services Limited | Hatfield | 2020 |
| Bluearrow Connect Ltd | Rochdale | 2026 |
| Blueatlan Limited | Walsall | 2022 |
| Blueaxis Logistics Limited | Southall | 2024 |
| Blueback Limited | London | 2007 |
| Bluebell Bakery Services Limited | Motherwell | 2018 |
| Bluebell Couriers Ltd | Plymouth | 2021 |
| Bluebell Extension Railway Limited | Sussex | 1975 |
| Bluebell Hill Enterprises Ltd | Kidderminster | 2025 |
| Bluebell Parking Ltd | Wednesbury | 2023 |
| Bluebell Railway Operating Limited | Sussex | 1960 |
| Bluebell Railway PLC | Sussex | 1985 |
| Bluebell Transport Ltd | Castleford | 2012 |
| Bluebell Travel Ltd | Plymouth | 2026 |
| BLUEBELLA1878 Ltd | Liverpool | 2021 |
| Bluebells Taxi Ltd | St. Albans | 2025 |
| Blueberry Airport Transfer Ltd | Northolt | 2012 |
| Blueberry's Storage and Logistics Ltd | London | 2021 |
| Bluebird Buses Limited | Perthshire | 1936 |
| Bluebird Carriers Limited | Twickenham | 2001 |
| Bluebird Coaches Ltd. | Middleton | 1994 |
| Bluebird Distributors Limited | Lutterworth | 1978 |
| Bluebird Logistics Ltd | Whitfield, Dover | 2021 |
| Bluebird London Limited | London | 2015 |
| Bluebird Minibus Hire Ltd | Rochdale | 2026 |
| Bluebird Trading Company 06 Limited | West Malling | 2013 |
| Bluebird Transconnect Ltd | Northampton | 2024 |
| Bluebird Transport Limited | Nottingham | 2003 |
| Bluebird Travel (NE) Ltd | Middlesbrough | 2019 |
| Bluebirds Travel Limited | Treorchy | 2012 |
| Bluebox Logistics Ltd | Stoke-On-Trent | 2020 |
| Bluebox Removals & Transport Ltd | Aberdare | 2025 |
| Bluebox Removals Ltd | Middlesbrough | 2022 |
| Bluebox Storage (North East) Ltd | Middlesbrough | 2015 |
| Bluebox Storage (Stockton) Limited | Middlesbrough | 2016 |
| Bluebox Transport Ltd | Cheltenham | 2026 |
| Bluebridge Freight Ltd | Leicester | 2025 |
| Bluebridge Xpress Ltd | London | 2025 |
| Bluecap Limited | Huddersfield | 2007 |
| Bluecart Courier Service Limited | Southall | 2025 |