| Biketrial Federation UK Limited | Strathaven | 2017 |
| Bikewise Motorcycle Training Limited | Wolverhampton | 2021 |
| Bikram Yoga Loughborough Ltd | Leicester | 2020 |
| Bil-Lingua Ltd | London | 2018 |
| Bila Law Academy CIC | Birmingham | 2021 |
| Bilal Education Limited | Woodford Green | 2008 |
| Bilberry Education Services Ltd | Birmingham | 2023 |
| Bilby School UK Limited | Coalville | 2013 |
| Bilfen Education Company Ltd | London | 2016 |
| Bilfen Education Consulting & Coaching Ltd | London | 2022 |
| Bilga Enterprise Ltd | Birmingham | 2022 |
| Bilingual Beats Limited | London | 2013 |
| Bilingual Club Ltd | Bristol | 2025 |
| Bilingual Day Nursery & Preschool Limited | Ashby-De-La-Zouch | 2017 |
| Bilingual Day Nursery & Preschool Ravenstone Limited | Ravenstone | 2021 |
| Bilingual Day Nursery & Preschool Twycross Ltd | Ashby-De-La-Zouch | 2026 |
| Bilingual Education Hub Ltd | Ashby-De-La-Zouch | 2026 |
| Bilingual for Training Ltd | London | 2023 |
| Bilingual Potential Ltd | London | 2015 |
| Bilingual Primary School Trust Limited | Hove | 2010 |
| Bilinguasing Limited | Maidenhead | 2014 |
| Bill Hoten Education Training & Consultancy Limited | Olney | 2016 |
| Bill LEE Professional Training Solutions Limited | Bristol | 2004 |
| Bill Plant Driving School Limited | Ripon | 2014 |
| Bill Plant Holdings Limited | London | 2016 |
| Bill Quay Training Ltd | Gateshead | 2021 |
| Bill Toleman Consultancy Ltd | Seaton | 2024 |
| Billericay Arts Association | Billericay | 1990 |
| Billericay Community Trust | Billericay | 2009 |
| Billie's Fins Cambs Ltd | Pinchbeck | 2023 |
| Billie's Fins Events Ltd | Pinchbeck | 2023 |
| Billie's Fins Ltd | Pinchbeck | 2016 |
| Billing Brook School Academy Trust | Northampton | 2013 |
| Billingham Synthonia Juniors Football Club CIC | Billingham | 2020 |
| Billinghay Stags FC CIC | Lincoln | 2023 |
| Billings Method England Community Interest Company | Stevenage | 2024 |
| Billionsfx Forex Course Ltd | Liverpool | 2019 |
| Bills Wheels Driving School Ltd | Swanage | 2025 |
| Billy & Andy's Music School CIC | Manchester | 2018 |
| Billy Crown Art Ltd | London | 2025 |
| Billy's ABC CIC | Coventry | 2024 |
| Billy's Motorcycle Training Limited | Storrington | 2026 |
| Bilston Resource Centre | Bilston | 1999 |
| Bilton Grange Foundation Limited | Rugby | 2009 |
| Bilton Sunbeams Pre-School Ltd | Rugby | 2011 |
| Bilzebub Ltd | Wymondham | 2026 |
| Bilztu Limited | London | 2025 |
| BIM Education Ltd | Elloughton | 2021 |
| Bimal Cultural Intelligence Limited | Sheffield | 2019 |
| Bimm 1 Limited | Hove | 2015 |
| Bimm Group Limited | Hove | 2010 |
| Bimm Holdings Limited | Hove | 2010 |
| Bimm University Limited | Hove | 2007 |
| Bimmauk Limited | Kidderminster | 2020 |
| Bimmy Hair and Beauty Academy CIC | London | 2025 |
| Bina EDU Ltd | London | 2025 |
| Binapani Ltd | Sutton | 2023 |
| Binary Words Ltd | London | 2014 |
| Binayak Enterprise Limited | Dagenham | 2021 |
| Bindal Investments Limited | Crawley | 2004 |
| Bindle Resources Ltd | Shipston-On-Stour | 2021 |
| Bindu Childcare Services Ltd | Hornchurch | 2014 |
| Binevenagh Adventures Ltd | Londonderry | 2020 |
| Bing Pilates Ltd | London | 2015 |
| Bingham Kindergarten Limited | Malmesbury | 2005 |
| Bingham Rugby Football Club Ltd | Nottingham | 2018 |
| Bingol Intensives Ltd | Bristol | 2023 |
| Bingos International Education Ltd. | Richmond | 2018 |
| Bino Trading Ltd | Southsea | 2022 |
| Binocular Vision Film Ltd | London | 2025 |
| Binwei Study Limited | Leeds | 2025 |
| BIO With Confidence Ltd | Kenilworth | 2022 |
| Bio-Chem Pathways Limited | Newcastle Upon Tyne | 2025 |
| Bio-Leadership Ecosystem Group Ltd | Bristol | 2021 |
| Biochem Education Limited | London | 2016 |
| Biocrest Diagnostics and Training Ltd | London | 2026 |
| Biodel Nursery and Training Services Ltd | London | 2014 |
| Biodynamic Agricultural College | Stroud | 2010 |
| Biodynamics Limited | Ealing | 1987 |
| Bioedtech Limited | London | 2020 |
| Bioemulation UK Ltd | London | 2024 |
| Biofeedback Federation CIC | London | 2011 |
| Biograd Education Limited | Liverpool | 2017 |
| Biograd Limited | Liverpool | 2014 |
| Biological Recording Company Ltd | Uxbridge | 2023 |
| Biological Relationships Ltd | London | 2025 |
| Biology by Clare Limited | Billericay | 2023 |
| Biology Plus Limited | Wilmslow | 2026 |
| Biology Squad Ltd | Newcastle Upon Tyne | 2022 |
| Biomath Ltd | London | 2022 |
| Biomations.Ai Ltd | London | 2025 |
| Biomed Career Hub Ltd | Maidstone | 2026 |
| Biomedical Education Limited | Wisborough Green | 2008 |
| Biomedical Training Limited | Westerham | 2013 |
| Biomedicaltech Limited | Southampton | 2021 |
| Biomime UK Ltd | London | 2020 |
| Biona-Sphere Ltd | Dunstable | 2023 |
| Bionik Strength Education Ltd | Manchester | 2023 |
| Bionik Strength Ltd | Manchester | 2020 |
| Biophilic Education Alliance Limited | London | 2021 |