| British Generic Manufacturers Association Limited | London | 2016 |
| British Geomembrane Association Limited | Corby | 2022 |
| British Georgian Association | Brentford | 2011 |
| British Greyhound Racing Fund Limited | London | 1992 |
| British Guild of Agricultural Journalists | London | 2013 |
| British Guild of Travel Writers Limited | Ipswich | 2015 |
| British Gurkha Army EX Servicemans Organisation Limited | Aldershot | 2023 |
| British Hajj and Umrah Council C.I.C. | Ilford | 2016 |
| British Hang Gliding & Paragliding Association Limited | Leicester | 1991 |
| British Hardwood Tree Nursery Limited | Royston | 2004 |
| British Healthcare Business Intelligence Association | Sheffield | 2014 |
| British Healthcare Trades Association | Nottingham | 1919 |
| British Heritage Sheep | Malvern | 2020 |
| British Hindu Sewa Samiti Ltd | Borehamwood | 2025 |
| British Holstein Society | Telford | 1980 |
| British Home Enhancement Trade Association Ltd | Birmingham | 1989 |
| British Honey Importers & Packers Association Limited | Abingdon | 1989 |
| British Horological Institute Limited(The) | Newark | 1913 |
| British Horse Council CIC | High Wycombe | 2018 |
| British Horse Trials Association Limited | Meriden | 2000 |
| British Hospitality Association | London | 1910 |
| British Humane Association | Cardiff Road | 1922 |
| British Hydropower Association Limited | Ferndown | 2006 |
| British Indoor Skydiving Association Limited | Grantham | 2019 |
| British Infection Association | Bathgate | 1999 |
| British Institute and Association of Electrolysis Limited | Maidstone | 1956 |
| British Institute of Embalmers (the) | Solihull | 1929 |
| British Institute of Funeral Directors | Holmfirth | 2007 |
| British Institute of Interior Design | London | 1965 |
| British Institute of Learning Disabilities | London | 1993 |
| British Institute of Professional Photography | Preston | 1921 |
| British Institute of Verbatim Reporters | Harrow | 1887 |
| British International Freight Association | Feltham | 1944 |
| British Invisible Mending Service Limited | London | 1994 |
| British Isles Biochar Association Ltd | Saffron Walden | 2026 |
| British Isles Grooming Association Ltd | Huntingdon | 2016 |
| British Italian Hair Dresser Ltd | London | 2016 |
| British Kinematograph Sound and Television Society C.I.C. | London | 1946 |
| British Laryngological Association | Lincoln | 2013 |
| British Limbless Ex-Service Men's Association | Chelmsford | 2000 |
| British Mahabodhi Society Limited | The Avenue, Chiswick | 2006 |
| British Marine Equipment Council Limited | London | 2000 |
| British Marine Federation | Southampton | 1991 |
| British Marine Federation South West | Plymouth | 2004 |
| British Measurement and Testing Association | Walton-On-Thames | 1991 |
| British Meat Processors' Association | London | 2003 |
| British Mensa Limited | Wolverhampton | 1970 |
| British Metal Tubes and Fittings Association Limited | Chelmsford | 2022 |
| British Microlight Aircraft Association Limited | Banbury | 1982 |
| British Miniature Horse Society | Nr Bridgwater | 1994 |
| British Motor Cycle Racing Club Limited | London | 1949 |
| British Motorcyclists Federation (Enterprises)Limited(The) | Leicester | 1970 |
| British Motorsports Marshals' Club Limited | Hertford | 1969 |
| British Mountaineering Council | Manchester | 1993 |
| British Naturism | Northampton | 2010 |
| British Neuroscience Association Limited | Bristol | 2001 |
| British Nigeria Law Forum C.I.C. | London | 2025 |
| British Nigerian Aviation Association (Bnaa) Ltd | London | 2013 |
| British Nigerian Councillors Community Interest Company | Romford | 2021 |
| British Numismatic Trade Association Limited(The) | Southend On Sea | 1974 |
| British OIL Security Syndicate Limited | Leamington Spa | 2005 |
| British Orthopaedic Association | London | 1997 |
| British Overseas Ngos for Development (Bond) | London | 1997 |
| British Paediatric Services Limited | London | 1987 |
| British Pakistan Initiative Limited | London | 2022 |
| British Pakistani Lawyers Club (Bplc) Ltd | Slough | 2023 |
| British Pakistani Orthopaedic Society CIC | Lincoln | 2021 |
| British Parachute Association Limited | Leicester | 1966 |
| British Pest Control Association | Derby | 1982 |
| British Pharma Group Limited | London | 1990 |
| British Plastics Federation(The) | London | 1933 |
| British Poultry Breeders and Hatcheries Association Limited | London | 1971 |
| British Poultry Council Limited | London | 1967 |
| British Precast Concrete Federation Limited(The) | Leicester | 1975 |
| British Printing Industries Federation Ltd | Coventry | 2001 |
| British Promotional Merchandise Association Limited | Ipswich | 2002 |
| British Pump Manufacturers Association Limited | West Bromwich | 2009 |
| British Retail Consortium | London | 1946 |
| British Roundnet Limited | Bristol | 2020 |
| British Sake Association | London | 2008 |
| British Sarozal Limited | Brecon | 1946 |
| British Science Fiction Association Limited(The) | Hitchin | 1967 |
| British Screen Forum | London | 1999 |
| British Security Industry Association Limited(The) | Worcester | 1967 |
| British Shops and Stores Association Limited | Birmingham | 1991 |
| British Sign and Graphics Association Ltd | Newark | 1988 |
| British Simmental Cattle Society Limited(The) | Warwickshire | 1970 |
| British Skydiving Limited | Leicester | 2020 |
| British Small Animal Veterinary Association | Quedgeley | 1993 |
| British Society for Antimicrobial Chemotherapy | Birmingham | 2002 |
| British Society for Children's Orthopaedic Surgery | Edinburgh | 2013 |
| British Society for Heart Failure | London | 1999 |
| British Society for Histocompatibility and Immunogenetics | Sheffield | 2007 |
| British Society for Middle Eastern Studies | London | 2013 |
| British Society for Strain Measurement Limited | London | 1965 |
| British Society for Surgery of the Hand(The) | London | 1975 |
| British Society of Cardiovascular Magnetic Resonance | Swaffham | 2004 |
| British Society of Criminology | Letchworth Garden City | 1998 |
| British Society of Echocardiography | London | 2002 |
| British Society of Gastroenterology | London | 2012 |