| British Micanizing Co. (Great Barr) Limited | Aldridge | 1942 |
| British Motor Heritage Limited | Witney | 1929 |
| British Moulding Machine Company Limited(The) | Kent | 1932 |
| British Overhead Irrigation Limited | London | 1923 |
| British Overseas Railways Historical Trust(The) | London | 1984 |
| British Polythene Industries Limited | Corby | 1910 |
| British Polythene Limited | Corby | 1939 |
| British Rema Process Equipment Limited | London | 2005 |
| British Rema Processing Limited | London | 1980 |
| British Rema Rotary Engineering Ltd | London | 1992 |
| British Silverware Limited | Sheffield | 2005 |
| British Steel Limited | Scunthorpe | 2019 |
| British Sugar PLC | London | 1936 |
| British Timken Limited | Dudley | 1997 |
| British Turntable Co Limited | Bolton | 1960 |
| British Velvets Limited | Burnley | 1955 |
| British Waterbed Company Limited | Exeter | 1988 |
| British WAX Refining Company Limited(The) | Redhill | 1914 |
| British-American Tobacco (Mauritius) P L C | London | 1926 |
| Britkong EAT Ltd | Worcester Park | 2023 |
| Britlam UK Ltd | London | 2025 |
| Britlift Ltd | Dorchester | 2017 |
| Britmag Limited | Leeds | 1997 |
| Britman UK Ltd | Brigg | 2019 |
| Britmatrix Engineering Limited | Monmouthshire | 2009 |
| Britmet Industries (UK) Ltd | London | 2025 |
| Britmoon Pharma Ltd | London | 2024 |
| Britolis RB Link Ltd | London | 2020 |
| Briton & Ensign Limited | Hertfordshire | 1980 |
| Briton Air Limited | North Newton | 2019 |
| Briton Energy Ltd | Coventry | 2022 |
| Briton Engineering Developments Limited | Holmfirth | 1979 |
| Briton Global Trade Ltd | West Midlands, England | 2026 |
| Briton Steel Forming Ltd | Blackburn | 2025 |
| Britot Ltd | Orpington | 2011 |
| Britpack Solutions Ltd | London | 2026 |
| Britpak Lancashire Ltd | Burnley | 2025 |
| Britpharm and Clinics Ltd | London | 2022 |
| Britpharmacare UK Limited | London | 2018 |
| Britplas Fabrications Limited | Warrington | 1995 |
| Britprecision Altimeters Ltd | Chelmsford | 2025 |
| Britpulse Feed Ingredients Ltd | Scunthorpe | 2025 |
| Britquartz Ltd | Coulsdon | 2025 |
| Britrack Ltd | Nelson | 2023 |
| Britroll Manufacturing Ltd | Salford | 2025 |
| Brits Bakes Ltd | London | 2024 |
| Brits Envirotech Limited | Epsom | 2025 |
| Brits Supps Ltd | London | 2025 |
| Britsolids Industrial Engineering Ltd | London | 2024 |
| Britson Limited | Hailsham | 2015 |
| Britspace Modular Buildings Limited | Manchester | 2002 |
| Britsport Ltd | Wooler | 2018 |
| Britsupplies Limited | Stoke-On-Trent | 2021 |
| Brittac Ltd | Ilford | 2010 |
| Brittain Abrasives Limited | Chesterfield | 2009 |
| Brittains Beverages Ltd | York | 2018 |
| Brittannia OIL Ltd | Manchester | 2025 |
| Brittannia Textile Printers (Leicester) Limited | Leicester | 1987 |
| Brittany Concepts Ltd | Wembley | 2020 |
| Brittany Ltd | Devizes | 2022 |
| Brittech Controls Europe Limited | Truro | 1995 |
| Brittech Edge Ltd | Kington | 2025 |
| Brittechhub Ltd | London | 2025 |
| Britten (UK) Limited | Bradford-On-Avon | 2007 |
| Britten Engineering Limited | Leicester | 1986 |
| Britten-Norman Aerospace Ltd | | 2007 |
| Brittex Engineering Limited | Newbury | 1998 |
| Brittherm Solutions Ltd | Smethwick | 2025 |
| Britton Manufacturing Ltd | Stirling | 2020 |
| Britton Price Hoists (NI) Limited | Hove | 2015 |
| Britton Price Hoists Limited | Hove | 2014 |
| Britton Price Holdings Limited | Hove | 2015 |
| Britton Price Lifts (LG) Ltd | Hove | 2019 |
| Britton Price Lifts Limited | Hove | 2015 |
| Britton Price Limited | Hove | 1996 |
| Britton Price Training Limited | Hove | 2016 |
| Brittons Fork Lifts Ltd | Wednesbury | 2003 |
| Brittons Group Limited | Stone | 2015 |
| Brittons Meadery Ltd | Barrow-In-Furness | 2022 |
| Brittons the Workshop Ltd | Bridlington | 2011 |
| Britvic Asset Company NO.1 Limited | Hemel Hempstead | 2011 |
| Britvic Asset Company NO.2 Limited | Hemel Hempstead | 2011 |
| Britvic Asset Company NO.3 Limited | Hemel Hempstead | 2011 |
| Britvic Asset Company NO.4 Limited | Hemel Hempstead | 2011 |
| Britvic Emea Limited | Hemel Hempstead | 1986 |
| Britvic International Investments Limited | Hemel Hempstead | 1986 |
| Britvic Limited | Hemel Hempstead | 2005 |
| Britvic Overseas Limited | Hemel Hempstead | 2010 |
| Britvic Soft Drinks Limited | Hemel Hempstead | 1953 |
| Britwear Limited | Nottingham | 2022 |
| Britwell Pharma Ltd | Manchester | 2025 |
| Britwind Limited | Stroud | 2014 |
| Britz Design and Print Ltd | Birmingham | 2022 |
| Britz Seltzer Ltd | London | 2025 |
| Brivessa Tech Ltd | Poplar | 2026 |
| Brivora Limited | Nuneaton | 2024 |
| Brix and Bailey Limited | Salisbury | 2013 |
| Brix Aviation Limited | Northampton | 2022 |
| Brix Engineering Limited | Wokingham | 2025 |
| Brix Joinery Limited | Cumnock | 2022 |