| Bristows Bars Ltd | London | 2024 |
| Bristworld Ltd | Haverfordwest | 2025 |
| Brit Construct Limited | Hereford | 2024 |
| Brit Education Consultant Ltd | Luton | 2020 |
| Brit Fire Limited | Norwich | 2012 |
| Brit Holdings Limited | Weybridge | 2015 |
| Brit Pontins Limited | Hale | 2004 |
| Brit POP Ltd | Harrogate | 2012 |
| Brit Prime Ltd | Ilford | 2025 |
| Britain Ltd | London | 2002 |
| Britaniashaw Investments Limited | Suffolk | 2001 |
| Britannia Architectural Metalwork Ltd | Brackley | 2020 |
| Britannia Book-Keeping Services Limited | Fareham | 2006 |
| Britannia Centre Limited | Hale | 1985 |
| Britannia Design & Print Limited | Birmingham | 2006 |
| Britannia Estates (Luton) Limited | Dunstable | 1972 |
| Britannia Fitness Ltd | Mildenhall | 2020 |
| Britannia Homes 1 Limited | Flint | 2013 |
| Britannia Hotels NO3 Limited | Altrincham | 2023 |
| Britannia Logistics Limited | Stockport | 1988 |
| Britannia Parking Limited | Bournemouth | 1996 |
| Britannia Products Limited | Bradford | 1967 |
| Britannia Property (London) Limited | Leigh-On-Sea | 2017 |
| Britannia Saddlemakers Ltd | Shifnal | 2016 |
| Britannia Stairlifts Limited | Station Road, Keighley, Bradford | 2000 |
| Britannia Tidal Energy Limited | Baildon | 2010 |
| Britanniabridges Financial Ltd | Edinburgh | 2026 |
| Britanniaconstruct Ltd | Edinburgh | 2026 |
| Britanniamover Logistics Ltd | Ipswich | 2026 |
| Britannic Home Improvement Ltd | New Barnet | 2011 |
| Britannic Worldwide Limited | Ruislip | 2007 |
| Britannicbridges Investments Ltd | London | 2026 |
| Britanniccarrier Systems Ltd | London | 2026 |
| Britbraz Trading Limited | London | 2013 |
| Britbridges Scholars Ltd | London | 2026 |
| Britclean Limited | Stoke On Trent | 2001 |
| Britcoin Chainlink Ltd | Doncaster | 2025 |
| Britcore Trading Ltd | Manchester | 2025 |
| Brite Sparks Limited | Newport Pagnell | 1988 |
| Britfin Elite Services Ltd | London | 2026 |
| Britflicks Ltd | Folkestone | 2010 |
| Britflow Finance Ltd | Ipswich | 2026 |
| Brithealth Innovations Ltd | London | 2025 |
| Brithene Films Limited | Corby | 1952 |
| Britiania Limited | London | 2009 |
| Britimpex Limited | Twyford | 1995 |
| British & European Sales Limited | Tenterden | 1979 |
| British & Overseas Consultants Limited | | 1996 |
| British Aircraft Corporation (Pension Fund Trustees) Limited | Camberley | 1963 |
| British Aircraft Corporation Limited | Camberley | 1963 |
| British Airways (BA) Limited | Harmondsworth | 2012 |
| British American Optical Company Limited | Maidstone | 2007 |
| British and South American Steam Navigation Company Limited | London | 1924 |
| British Chinese Consulting Ltd | Shaftesbury | 2017 |
| British Contracts Company Limited | Kings Langley | 1920 |
| British Crop Driers Limited | Lincoln | 1933 |
| British Crown Green Bowling Association | Stourbridge | 2013 |
| British East India (Holdings) Limited | Birkenhead | 2008 |
| British Finance Company Limited | Belfast | 1926 |
| British Friends of Neve Institute of Tzfat | Stamford Hill | 2011 |
| British Gypsum Limited | Leicestershire | 1925 |
| British Hernia Centres Ltd | Stanmore | 1994 |
| British Homeowners Limited | | 2002 |
| British HOP Products Limited | Maidstone | 1974 |
| British Horse Feeds B.H.F. Limited | Ripon | 1980 |
| British Hovercraft Corporation Limited | Birmingham | 1913 |
| British Indulgence Ltd | Malpas | 2011 |
| British Industrial Gases Limited | Woking | 1955 |
| British Iranian Insurance Association Limited | Ipswich | 2017 |
| British Jaeger Instruments Limited | Sheffield | 2004 |
| British Jeffrey Diamond Limited | Wakefield | 2024 |
| British Lighting Industries Limited | London | 1964 |
| British Lion Television Limited | Basingstoke | 1991 |
| British Mackerel Exports Limited | East Yorkshire | 1979 |
| British Margarine Company Limited(The) | London | 1906 |
| British Mining Consultants Limited | Nottingham | 1987 |
| British Mount Everest North Ridge Expedition Ltd | Newport | 2010 |
| British Music Rights Limited | London | 2008 |
| British Northrop Limited | Manchester | 1902 |
| British Nuclear Group Limited | London | 2004 |
| British Optical Limited | Walsall | 1991 |
| British Overseas Bank Nominees Limited | London | 1927 |
| British Pens Limited | Warley | 1945 |
| British Portland Cement Association Limited (the) | Birmingham | 1924 |
| British Power International Limited | Leeds | 1995 |
| British Spirals and Castings Limited | High Peak | 2014 |
| British Springs Limited | Sheffield | 1997 |
| British Steam Specialties (International) Limited(The) | Northampton | 1960 |
| British Tenpin Bowling Association | Broadstone | 1974 |
| British Time Limited | Rotherham | 1917 |
| British Toy Council Limited | London | 1967 |
| British Toy Fairs (International) Limited | London | 1957 |
| British Tungsten Limited | London | 1952 |
| Britishbridges Studios Ltd | London | 2026 |
| Britmade Limited | Rugby | 1997 |
| Britmarl Property Co.Limited | Glastonbury | 1971 |
| Britmed Healthcare Private Limited | Uxbridge | 2026 |
| Britmove Transport Ltd | London | 2026 |
| Britnovapay Ltd | London | 2026 |
| Britopia Global Limited | Ellesmere Port | 2018 |