| Business Help uk ltd | Romford | A rating |
| Business Horizon International Group Ltd | London | A rating |
| Business I.T. Systems Ltd | Chessington | A rating |
| BUSINESS IN THE CITY T/A MAILBOXES ETC MAIDA VALE | LONDON | A rating |
| Business in the Community | London | A rating |
| BUSINESS INSIDER EUROPE LIMITED | London | A rating |
| Business Insight 3 | Preston | A rating |
| Business Insights Private Limited | Birmingham | A rating |
| Business Insurance Solutions Limited | Guildford | A rating |
| Business Integration Partners SPA | London | A rating |
| Business Intelligence and Strategy Limited | Loughborough | A rating |
| Business Intelligence Partners Ltd | Watford | A rating |
| Business Launchpad | London | A rating |
| Business Link Consultancies UK Ltd | Liverpool | A rating |
| BUSINESS MAIL SOLUTIONS LIMITED | London | A rating |
| BUSINESS MANAGEMENT LONDON LIMITED | COVENTRY | A rating |
| Business Modelling Associates UK Limited | Leeds | A rating |
| Business Modelling Associates UK Ltd. | Chester | A rating |
| Business Moves Ltd | Reading | A rating |
| Business Rates Hub Limited | Bury | A rating |
| BUSINESS RATES RELIEF LIMITED | Essex | A rating |
| BUSINESS RISKS INTERNATIONAL LIMITED, | Uxbridge | A rating |
| Business School England Limited | London | A rating |
| Business Science Corporation Ltd | Staines | A rating |
| Business Services International (UK) Limited | London | A rating |
| Business Services Organisation | Belfast | A rating |
| Business Show Media Ltd. | Bristol | A rating |
| Business Skills Interactive Limited | London | A rating |
| Business Solutions Corporation Limited | High Wycombe | A rating |
| Business Support for UK Limited | London | A rating |
| BUSINESS SWEDEN | London | A rating |
| Business Sweden Business Support Office UK branch | London | A rating |
| Business Systems (U.K.) Limited | London | A rating |
| Business Systems International Ltd. | London | A rating |
| Business Talent Group Europe Ltd | London | A rating |
| Business Together Limited | Watford | A rating |
| Business tools and solutions limited | Nottingham | A rating |
| Businesscare UK Limited | London | A rating |
| BUSINESSES INTERNATIONAL LONDON LTD | Hornchurch | A rating |
| businessfourzero (a trading name of Business 3.0 Limited) | London | A rating |
| BusinessLDN | London | A rating |
| BusinessMobiles.com Ltd | London | A rating |
| BusinessOptix Limited | Guildford | A rating |
| Businessxbridge LTD | Bromley | A rating |
| Bussey & Sabberton Bros. Ltd | Norwich | A rating |
| Buster and Punch Limited | Peterborough | A rating |
| BUSTER MANTIS LTD | LONDON | A rating |
| Busuu Limited | London | A rating |
| Busuu Ltd | London | A rating |
| BUSY BEA CLEANING LIMITED | Barton On Sea | A rating |
| Busy Bee Builders Merchants Limited | London | A rating |
| Busy Bees Care Limited | Polmont | A rating |
| Busy Bees Nurseries Ltd | Burntwood | A rating |
| Busy Books (Westbury) Ltd | Westbury | A rating |
| Butacare Limited | Manchester | A rating |
| Butchies LTD | London | A rating |
| Butcombe Brewery | Bristol | A rating |
| Bute & Cowal Vets | Rothesay | A rating |
| Bute Construction Ltd | Edgware | A rating |
| Bute House Medical Centre | Luton | A rating |
| Bute House Preparatory School for Girls Limited | LONDON | A rating |
| Bute St Beauty Limited | London | A rating |
| Buth Bheag Ltd T/A Essence of Harris | Isle of Harris | A rating |
| Butler and Wilson Limited | London | A rating |
| Butler Investment Managers Limited | London | A rating |
| Butler Signs | Newbury | A rating |
| Butler Snow UK, LLP | London | A rating |
| Butler Traditional Wooden Boats Ltd | Truro | A rating |
| Butlerbus Technik Limited | Lincoln | A rating |
| Butlers Balti House Limited | Sheffield | A rating |
| Butlers Farmhouse Cheeses Ltd | Preston | A rating |
| Butlins Skyline Ltd | Hemel Hempstead | A rating |
| BUTT & CO (UK) LIMITED | Uxbridge | A rating |
| Butt & Co Services Ltd | Watford | A rating |
| Butt & Hobbs Limited t/a Hobbs Pharmacy | Dartford | A rating |
| BUTT AND CO ACCOUNTANTS LTD | LONDON | A rating |
| BUTT BROTHERS | DEWSBURY | A rating |
| BUTT KARAHI (BOLTON) LTD | Bolton | A rating |
| Butt Kiosk | Reading | A rating |
| Butt Lane Dental Surgery | Stoke -on- Trent | A rating |
| Butt Services Ltd | Wigan | A rating |
| BUTT&JUTT ENTERPRISES LIMITED | Essex | A rating |
| BUTTAR CONSTRUCTION (UK) LIMITED | HOUNSLOW | A rating |
| Buttar Loft and Construction Limited | Hounslow, | A rating |
| Butte Enterprises Limited | Surbiton | A rating |
| BUTTER BEANS | Richmond | A rating |
| Buttercross Dental Ltd | Oxfordshire | A rating |
| Buttercross View Dental Practice | Nottingham | A rating |
| BUTTERCUPS EMPIRE | Poole | A rating |
| Butterfield Group Services Limited | London | A rating |
| Butterfield House (Kismet House) | Shipley | A rating |
| Butterfield Morgan Limited | Swansea | A rating |
| BUTTERFINGERS LONDON LTD T/A BUTTERFINGERS LONDON | London | A rating |
| Butterfly Childminding Ltd | Worcester Park | A rating |
| Butterfly Foods and Packaging Ltd | Blackburn | A rating |
| Butterfly Hair Salon Limited | Cambridge | A rating |
| Butterfly Projects Ltd | Cardiff | A rating |
| Butterfly's Care Homes Ltd | Colchester | A rating |
| ButterflyCannon Limited | London | A rating |
| Butterley House | Butterley, | A rating |
| BUTTERMERE FARMS LIMITED | MARLBOROUGH | A rating |
| Buttermilk Limited | London | A rating |
| BUTTERMILK LONDON LIMITED | Greenford | A rating |
| Butterwick Fine Arts Limited | London | A rating |
| Butterworth Laboratories Ltd | Teddington | A rating |
| Button PR Limited T/A Button Collective | London | A rating |
| Button Tech UK Limited | London | A rating |
| BUTTS CROFT HOUSE | COVENTRY | A rating |
| BUTTS NEWS FOOD AND WINE LTD | COVENTRY | A rating |
| BUX (NW) LIMITED | preston | A rating |
| BUX Financial Services Limited | London | A rating |
| Buxted Park Cricket Club | Buxted | A rating |
| Buxton Arts Festival | Buxton | A rating |
| Buxton Butchers Limited | Bristol | A rating |
| Buxton Butchers Ltd | Bristol | A rating |
| Buxton School | London | A rating |
| BUY 2 SAVE (GG) LTD | London | A rating |
| Buy Fine Diamonds.com Ltd T/A Buy Fine Diamonds | London | A rating |
| Buy Fresh Ltd | Birmingham | A rating |
| Buy It Direct Ltd | Huddersfield | A rating |
| BUY N BUY GREENGROCERS LIMITED | London | A rating |
| Buy South Africa Limited | Kingston upon Thames | A rating |
| BUY WHOLE FOODS ONLINE LTD | Ramsgate | A rating |
| Buy-Investment-Properties Limited | LEEDS | A rating |
| Buy-Meds Limited | Blackburn | A rating |
| BUYBOX LIMITED | Glasgow | A rating |
| Buydefinition Limited | Warrington | A rating |
| BuyerDeck Limited | London | A rating |
| Buyezi Limited T/A Wootton Wawen Post Office Store | Henley in Arden | A rating |
| BUYHERE LTD | Manchester | A rating |
| BuyingTeam Limited T/A Proxima | London | A rating |
| BUYWELL STORE LTD T/A BUYWELL DAYTODAY | GLASGOW | A rating |
| BUYXPRESS LTD | Stockport | A rating |
| Buzy Bees Childcare Limited, T/A Blue Nest Montessori School | Harrow | A rating |
| Buzz Maid Yorkshire Limited | Sheffield | A rating |
| Buzz Maids Services Limited | Slough | A rating |
| Buzz Radar Limited | Chalfont St Giles | A rating |
| Buzzacott | London | A rating |
| Buzzev Limited | West Drayton | A rating |
| BuzzFeed UK Limited | London | A rating |
| Buzzing Bee Ltd | Dartford | A rating |
| Buzzmi (UK) Limited | London | A rating |
| BUZZSTREETS LIMITED | London | A rating |
| Buzzworks Holdings Limited | Kilmarnock | A rating |
| BVG Associates Ltd | Swindon | A rating |
| BVISION LIMITED | Watford | A rating |
| Bvlgari (UK) Ltd | London | A rating |
| BVM Ltd | Southampton | A rating |
| BVM Medical Ltd | Hinckley | A rating |
| BVMG Ltd T/A Bargain Booze | Bristol | A rating |
| BVN UK Architecture Ltd | London | A rating |
| BVNK Services Limited | London | A rating |
| BVP UK & Europe Investors Limited | London | A rating |
| BVRio UK Limited | Oxford | A rating |
| BVS LEGAL LIMITED T/S BVS LEGAL | LONDON | A rating |
| BVS MORTGAGES & FINANCIAL SERVICES LIMITED | LONDON | A rating |
| BVS RETAIL LTD | Scotland | A rating |
| BVU Ventures Ltd, t/a T4 Education | Hemel Hempstead | A rating |
| BW & Co (UK) Limited | London | A rating |
| BW BUSINESS SOLUTIONS (UK) LTD | London | A rating |
| BW CDMO HOLDINGS UK LIMITED | London | A rating |
| BW ESS Development UK Limited | London | A rating |
| BW Flexible Systems UK Limited | Beeston | A rating |
| BW Interiors Limited | London | A rating |
| BW Legal Services Ltd | West Yorkshire | A rating |
| BW Offshore (UK) Limited | Aberdeen | A rating |
| BW Partnership- Brant Road Dental Practice | Lincoln | A rating |
| BW Refrigeration & Air Conditioning Limited | Great Yarmouth | A rating |
| BW Solicitors Ltd | ILFORD | A rating |
| BW1 Consultants Ltd | Nottingham | A rating |
| BW1 Enterprise Group Ltd | Nottingham | A rating |
| BWA HEALTH & CARE SERVICES LTD | DERBY | A rating |
| BWAM UK Limited | London | A rating |
| BWB Consulting Ltd | Nottingham | A rating |
| BWC Wholesale Ltd T/A Kidzbuzz | Southall, Middlesex | A rating |
| BWC Windows Limited | London | A rating |
| BWF SOLICITORS | LONDON | A rating |
| BWP AUTOS LIMITED | Ilford | A rating |
| BWR Tyre Services Limited | Bradford | A rating |
| BWS International Limited | Northampton | A rating |
| BWS Security Systems Limited | Bath | A rating |
| BWSC Generation Services UK Ltd | Sleaford | A rating |
| BWT Developments Limited | London | A rating |
| BWT Single Roof Ply Ltd | Dungannon | A rating |
| Bwyta Bwyd Bombai (3B'S) Limited | Cardiff | A rating |
| BX Technologies Ltd | London | A rating |
| BX1 GROUP LTD | Romford | A rating |
| BXCAT Limited | Bolton | A rating |
| BXK LIMITED | Poyle | A rating |
| BXMEDIA Ltd T/A Union Collective | Essex | A rating |
| BXR Advisory Partners LLP | London | A rating |
| BXR Holdings Limited | London | A rating |
| By Association Only | St Ives | A rating |
| BY FIREFLY LTD | BRIGHTON | A rating |
| By Miles Ltd | Norwich | A rating |
| By Suzannah Ltd | London | A rating |
| By the fountain LTD | East Grinstead | A rating |
| By Your Side Limited | Hemel Hempstead | A rating |
| By-Pass Nurseries Limited | Colchester | A rating |
| BYANTARO LIMITED | London | A rating |