| British Association of Clinical Dental Technicians | Nottingham | 2009 |
| British Association of Hand Therapists Limited | | 1996 |
| British Association of Retinal Screening Ltd | Dundee | 2011 |
| British Association of Urological Nurses | London | 2010 |
| British Bangladesh Chamber of Women Entrepreneurs | London | 2013 |
| British Diabetic Association(The) | London | 1938 |
| British Epilepsy Association | Leeds | 1964 |
| British Focusing Association CIC | Shrewsbury | 2013 |
| British Forces Foundation | Pewsey | 1999 |
| British Foundation for International Reconstructive Surgery and Training | London | 2012 |
| British Friends of Reuth | West Hampstead | 2008 |
| British Geriatrics Society (the) | London | 1974 |
| British Gurkhas Nepali Citizenship Continuation Campaign (Bgnccc-Uk/Nepal) Ltd | Ashford | 2021 |
| British Heart Foundation | London | 1961 |
| British Herbal Medicine Association Limited(The) | Exeter | 1971 |
| British Inherited Cardiovascular Conditions Society Ltd | Cardiff | 2015 |
| British International Doctors' Association Ltd | Stockport | 1978 |
| British Islamic Medical Association | London | 2021 |
| British Kidney Patient Association(The) | Alton | 1975 |
| British Liver Trust | Winchester | 1988 |
| British Menopause Society | Marlow | 1992 |
| British Nigerian Safeguarding Consortuim Ltd | Grays | 2019 |
| British Nuclear Medicine Society | London | 2012 |
| British Obesity Society | Wolverhampton | 2011 |
| British Pakistan Foundation for Development | London | 2010 |
| British Pakistani Forum Limited | Birmingham | 2024 |
| British Pakistani Welfare Association Limited | Bedford | 2023 |
| British Pregnancy Advisory Service | Leamington Spa | 1984 |
| British Radiosurgery Society | Sheffield | 2008 |
| British Sjogren's Syndrome Association | Birmingham | 2003 |
| British Society of Blood and Marrow Transplantation and Cellular Therapy | London | 2008 |
| British Society of Paediatric Radiologists CIC | Stourport-On-Severn | 2026 |
| British Society of Skeletal Radiologists | Middlesbrough | 2010 |
| British Soft Drinks Industry Foundation | London | 1958 |
| British United Provident Association Limited(The) | London | 1947 |
| British-Ukrainian AID | London | 2014 |
| Britizhsierra Ltd | London | 2020 |
| Britlex UK Ltd | Weybridge | 2025 |
| Britmed Healthcare Ltd | Chatham | 2017 |
| Britmedical Limited | Cardiff | 2001 |
| Britmedicare Ltd | Uxbridge | 2023 |
| Britn Care Ltd | Guildford | 2020 |
| Britney Oulo Limited | Romford | 2025 |
| Britneyks Ltd | Shildon | 2025 |
| Briton Ferry (Ivolve) Limited | Chesterfield | 2025 |
| Briton Ferry Childcare Limited | Swansea | 2016 |
| Brits Aesthetic Services Ltd | London | 2022 |
| Brits Care Ltd | London | 2022 |
| Brits Desi Soci CIC | Leicester | 2024 |
| Brits Medical and Cosmetic Service Limited | Slough | 2020 |
| Britscare Health Solutions Limited | Derby | 2023 |
| Brittany Healthcare Services Ltd | Grays | 2025 |
| Britten Associates Limited | Walthamstow | 2013 |
| Brittenden Diagnostics Ltd | York | 2019 |
| Brittle Bone Society (BBS) | Dundee | 2020 |
| Britto Psychiatry Limited | Huddersfield | 2002 |
| Britton Macdonald Dental Ltd | Glasgow | 2025 |
| Britts Care Limited | London | 2025 |
| Britwell Care Ltd | Harrow | 2023 |
| Britwhit Enterprise Ltd | London | 2025 |
| Britz Health Care Ltd | Doncaster | 2021 |
| Britzke Nutrition Ltd. | London | 2014 |
| Brivailance Limited | Leicester | 2016 |
| Brivon Care Ltd | London | 2025 |
| Brivoria Medical Limited | Milton Keynes | 2022 |
| Brixham Dental Practice Limited | Brixham | 2009 |
| Brixham Future CIC | Brixham | 2016 |
| Brixton Advice Centre | | 1985 |
| Brixton Candle Enterprise CIC | London | 2024 |
| Brixton Care Limited | London | 2025 |
| Brixton Hill After-School Club Ltd | Romford | 2026 |
| Brixton Soup Kitchen | London | 2014 |
| Briym Ltd | Newbury | 2022 |
| Brizbal Care Services Limited | London | 2014 |
| BRJ Support Services Ltd | Matlock | 2019 |
| Brjet Ltd | Keighley | 2022 |
| Brjja Ltd | Romford | 2018 |
| Brjo Medico Ltd | Stanmore | 2025 |
| BRM Dentistry Ltd | Leeds | 2026 |
| Brmek Ltd | Waterlooville | 2022 |
| BRN Care Ltd | Stourbridge | 2014 |
| Brnc Limited | Grimsby | 2013 |
| BRO Room CIC | Nr.Lancaster | 2021 |
| BRO Trading and Services Ltd | Reading | 2015 |
| Bro's Healthcare Limited | London | 2022 |
| Broad Care Limited | London | 2025 |
| Broad Changes Care Ltd | Bournemouth | 2023 |
| Broad Eyecare (Sandbach) Ltd | Shipley | 2018 |
| Broad HEY Limited | Bolton | 2016 |
| Broad Home Care Ltd | Orpington | 2026 |
| Broad Horizons Limited | Colchester | 1998 |
| Broad Horizons Psychotherapeutic Services Ltd | Northampton | 2019 |
| Broad Horizons Social Care Limited | Mexborough | 2016 |
| Broad Leaf Care Ltd | Sheffield | 2022 |
| Broad Medicals Limited | Manchester | 2016 |
| Broad Oak Manor Developments Limited | Hertford | 2001 |
| Broad Oaks Health Clinic Limited | West Midlands | 2003 |
| Broad Peak Surgery Limited | Wilmslow | 2023 |
| Broad Reach Psychology Practice Ltd | Bournemouth | 2014 |
| Broad Smiles Limited | Oldham | 2018 |