| B&K Engineering Solutions Ltd | Middlesbrough | 2019 |
| B&K Hybrid Solutions Limited | Derbyshire | 2021 |
| B&L Installations Ltd | Southampton | 2025 |
| B&M British Maison Ltd | Braintree | 2025 |
| B&M Furniture Ltd | Southampton | 2016 |
| B&M Joinery (Chippenham) Limited | Chippenham | 2005 |
| B&M Packaging Services Limited | Bridgwater | 2011 |
| B&M Print and Embroidery Limited | Leicester | 2022 |
| B&M Surface Systems UK Limited | Northampton | 2014 |
| B&N Engineering Limited | Wrexham | 2019 |
| B&P Metal Work Ltd | Hayes | 2019 |
| B&S Craft Ltd | Coventry | 2024 |
| B&S Plastics Ltd | Bolton | 2019 |
| B&T Engineering (Midlands) Limited | Derby | 2020 |
| B&T Lighting Ltd | Louth | 2013 |
| B&V Repairs Ltd | Bathgate | 2025 |
| B&W Machinery Installation Limited | Stalybridge | 2019 |
| B&W the Collection Ltd | Harrow | 2021 |
| B&Z Metalcraft Ltd | Leighton Buzzard | 2013 |
| B' Adaptive Ltd. | St. Austell | 2020 |
| B'Ham Door Panels Ltd | West Bromwich | 2012 |
| B'Odysée Ltd | London | 2024 |
| B'S Bakes Limited | London | 2021 |
| B'S Craft Hive Ltd | Wigan | 2023 |
| B'Z Honey Limited | Glasgow | 2024 |
| B-B-L Protect Limited | Daresbury | 2020 |
| B-Cot Ltd | Newcastle Upon Tyne | 2021 |
| B-Eames Cutting Guide Limited | Liphook | 2020 |
| B-Equestrian Logistics Ltd | London | 2024 |
| B-Line Health & Beauty Products Limited | Grantham | 1990 |
| B-Loony Limited | Chesham | 1978 |
| B-On Automotive Limited | London | 2020 |
| B-Pack Print Ltd | Harlow | 2024 |
| B-Pak Automation Limited | Forest Row | 2016 |
| B-Print, Display & Logistics Limited | Durham | 2026 |
| B-Rad Engineering Ltd | St. Agnes | 2026 |
| B-Ral Supplies Ltd | Newcastle | 2026 |
| B-Seated Ltd | Bolton | 2009 |
| B-Spoke Kitchens Ltd | Glasgow | 2023 |
| B-Spoke Production Limited | Bromley | 2003 |
| B-Spoke Touch Ltd | Blackburn | 2024 |
| B-Tak Investments Limited | Chessington | 2010 |
| B-Tech Engineering Limited | Bracknell | 2003 |
| B-Trim Ltd | Ilford | 2023 |
| B. & a. Design & Manufacture Limited | County Durham | 2002 |
| B. & a. Engineering Company Limited(The) | St Leonards On Sea | 1933 |
| B. & a. Susca Limited | Hyde | 1989 |
| B. & B. Engineering Limited | King'S Lynn | 1985 |
| B. & D. Print Services Limited | Preston | 1976 |
| B. & E.M. Welding Limited | Luton | 1974 |
| B. & G. Food Products Limited | Heywood | 1973 |
| B. & G. Walker (Wire Fabrications) Limited | Batley | 1978 |
| B. & M. Longworth (Edgworth) Limited | Blackburn | 1976 |
| B. & S. Glass Industries Ltd. | Ware | 1928 |
| B. & S. Miller (Construction) Limited | Notting Hamshire | 1971 |
| B. & S. Threaded Products Limited | West Midlands | 1968 |
| B. & S. Tools Limited | Birmingham | 1947 |
| B. & T. Garden Buildings Limited | Wolverhampton | 1994 |
| B. and B.Press (Parkgate) Limited | Rotherham | 1963 |
| B. Armitage & SON Limited | Holmfirth | 1968 |
| B. Baah & Co Limited | Luton | 2016 |
| B. Conway (Mechanical Handling) Limited | Oldham | 1978 |
| B. Curtis Limited | Dorset | 1961 |
| B. D. 2000 Limited | Isleworth | 1999 |
| B. D. K. Industrial Products Limited | Ipswich | 1959 |
| B. G. Carpenter Limited | Somerset | 2002 |
| B. Girl Limited | London | 1993 |
| B. Hepworth and Company Limited | Redditch | 1981 |
| B. I. Limited | Leicester | 1982 |
| B. Luft Limited | Manchester | 2003 |
| B. Marshall Marine Limited | Middlesbrough | 2011 |
| B. Mccolgan Limited | Londonderry | 2020 |
| B. P. Engineering Co. (Wirral) Limited | Wirral | 1971 |
| B. Prothero and Co Blacksmiths Ltd | Stroud | 2021 |
| B. Provenance Ltd. | Altrincham | 2019 |
| B. Reilly Lift Services Ltd. | Glasgow | 2007 |
| B. Ross Welding Limited | Basildon | 2016 |
| B. S. a. Mouldings Limited | King'S Lynn | 1990 |
| B. S. Clothing Limited | London | 2009 |
| B. S. Engineering UK Ltd | The Wergs, Wolverhampton | 2002 |
| B. Thornton & Sons Limited | Rotherham | 2008 |
| B. U. Industrial Components Limited | Telford | 1976 |
| B. Yeomans (Pallets) Limited | Birmingham | 1974 |
| B.& B. Attachments Limited | Cramlington | 1980 |
| B.& G.Lock & Tool Co.Limited | Willenhall | 1952 |
| B.& M.Wireworks Limited | Liverpool | 1961 |
| B.& P.Macklin Limited | Berkshire | 1965 |
| B.& W. Darts & Trophies Limited | Clifford Road | 1980 |
| B.A London Ltd | London | 2024 |
| B.A. Caulkett Limited | Litlington | 1990 |
| B.A. Components Limited | Northamptonshire | 1998 |
| B.A. Haxby (Barnsley) Limited | South Yorkshire | 1984 |
| B.A. Hodcroft Ltd | Droylsden | 2019 |
| B.A.C Consultancy Group Ltd | Bridlington | 2019 |
| B.A.C.P. Limited | London | 2009 |
| B.A.D Carpentry and Construction Ltd | Worcester | 2026 |
| B.A.Gough Equipment Limited | Shrewsbury | 1964 |
| B.A.J. System Design Ltd. | Stourport-On-Severn | 1997 |
| B.A.R Engineering Ltd | Harlow | 2014 |
| B.A.Ribs Limited | Swindon | 2016 |