| Base Childrenswear Limited | Essex | A rating |
| Base Energy Services Ltd | Liverpool | A rating |
| Base Genomics Ltd | Oxford | A rating |
| BASE HAIR LTD | Sutton | A rating |
| BASE life science Limited | London | A rating |
| Base Solutions Limited | Sidcup | A rating |
| Base1 Media Limited | Farnborough | A rating |
| BaseballSoftballUK | Slough | A rating |
| Basecamp Brews Ltd | Kettering | A rating |
| Basecamp Research | London | A rating |
| Based Upon Ltd | London | A rating |
| BASEEL LIMITED | London | A rating |
| Baseera | London | A rating |
| Baseimmune Ltd | London | A rating |
| BaseKit Platform Ltd. | Bristol | A rating |
| BASELINE AIRCONDITIONING UK LTD | Redhill | A rating |
| BASELINE INTEGRATED SERVICES LIMITED | GLOUCESTER | A rating |
| Basemap Limited | Guildford | A rating |
| Baserri Ltd | Leamington Spa | A rating |
| BASF Metals ltd | London | A rating |
| BASF Plc | Stockport | A rating |
| Basford United Football Club Limited | Nottingham | A rating |
| BASH ECOCLEANERS SERVICE LTD | ANDOVER | A rating |
| Bash Grill Kingsbury Road Ltd | Birmingham | A rating |
| BASHIR AA & SONS LTD | Bristol | A rating |
| BASHIR ACCOUNTANTS LIMITED | Stanwell | A rating |
| Bashir Halal Meat Ltd | Morden | A rating |
| Bashtan Ltd | London | A rating |
| Basi Property Ltd | Ilford | A rating |
| BASIC Brain and Spinak Injury Centre Limited | Manchester | A rating |
| Basic Healthcare Ltd | Redhill | A rating |
| BASIC HOUSE LTD. | West Midlands | A rating |
| Basic Premier Limited | Leicester | A rating |
| BASIL CHINESE FOOD LTD | LONDON | A rating |
| Basil Corner Limited T/A Chicago Pizza | Birmingham | A rating |
| BASIL SHEILS BAR & RESTAURANT LTD | TASSAGH | A rating |
| Basil's Bakery Ltd | lower weston bath | A rating |
| Basildon Borough Council | Basildon | A rating |
| BASILDON CHEMICAL CO. LIMITED | Abingdon | A rating |
| Basildon Specsavers Limited T/A Specsavers Opticians | Basildon | A rating |
| Basileia Investment Holdings (UK) Limited | London | A rating |
| Basilic Fly Studio UK Private Limited | London | A rating |
| Basinghall Partners Limited | London | A rating |
| Basingstoke & Deane Borough Council | Basingstoke | A rating |
| Basingstoke Bison | Basingstoke | A rating |
| Basingstoke College of Technology | Basingstoke | A rating |
| BASINGSTOKE FOODS LTD t/a Honey And Ghee | Hampshire | A rating |
| Basingstoke Visionplus Limited T/A Specsavers Opticians | Basingstoke | A rating |
| BASIR COLLECTION LTD | London | A rating |
| BASIS CAPITAL MARKETS UK LIMITED | London | A rating |
| Basis Cloud Solutions Ltd | Leicester | A rating |
| Basis Ltd | London | A rating |
| Basis Research Limited | London | A rating |
| Basis Social Limited | Oxfordshire | A rating |
| Basis Social Limited | London | A rating |
| Basis Technologies International Ltd | Bracknell | A rating |
| Basis Technology Limited | Beaconsfield | A rating |
| Basit Knitwear Limited | Manchester | A rating |
| Basketball England | Manchester | A rating |
| basketballscotland | Edinburgh | A rating |
| BASLAW CONSULTING SERVICES LTD | Sutton Coldfield | A rating |
| Baslow Hall Ltd T/A Fischers | Baslow | A rating |
| BASLOW ROAD SURGERY - PEAK EDGE PCN | SHEFFIELLD | A rating |
| BASMARA TRADERS LTD | Kilmarnock | A rating |
| BASMATI LOCKS HEATH LIMITED | Southampton | A rating |
| Basra Cakes Ltd t/a Cakebox | Amersham | A rating |
| Basrah Lounge LTD | Manchester | A rating |
| Basrai Restaurant (Blackpool) Limited | Blackpool | A rating |
| Basrai Restaurant Limited | Ayr | A rating |
| Bassaleg Food & Wine Ltd | Newport | A rating |
| Basset Pubs Limited | Henley On Thames | A rating |
| Bassetlaw District Council | Worksop | A rating |
| Bassi Electrical Limited | Banbury | A rating |
| Bassi Supermarket Limited | Wolverhampton | A rating |
| Bassingbourn Community Primary School | Bassingbourn | A rating |
| Bassna Investments Group Limited | READING | A rating |
| Basswood UK Limited | London | A rating |
| Basta London Limited | London | A rating |
| BASTONSHOP LIMITED | LINCOLNSHIRE | A rating |
| Bastows Ltd | London | A rating |
| Basu Associates Limited | York | A rating |
| Basudev Enterprises Ltd, Bedford Dental Practice | Bedford | A rating |
| Basware Holdings Ltd | London | A rating |
| BASX LTD | Sandhurst | A rating |
| Bat & Alt LTD | London | A rating |
| BAT FUEL & SHOP LTD | Bridgewater | A rating |
| BAT MOH LIMITED | Sheffield | A rating |
| BATCAM LTD | thornwood | A rating |
| Batch and Co Speciality Coffee Ltd | Swanley | A rating |
| BATCH CONTROL SYSTEMS LTD | GLASGOW | A rating |
| BATCHABLE ENTERPRISES LTD T/A PHARMACO CHEMISTS | MANCHESTER | A rating |
| Batchw limited | London | A rating |
| BATEMAN & KNIGHT LIMITED | London | A rating |
| Bates Office Services Ltd | Rochester | A rating |
| Bates Transport Limited | Southall | A rating |
| Bates Wells & Braithwaite London LLP | London | A rating |
| Batfast Cricket Centres Limited | Nottingham | A rating |
| Bath Abbey PCC | Bath | A rating |
| BATH AND BEDDING LIMITED | Bolton | A rating |
| BATH AND DISTRICT PHARMACY LIMITED | Walsall | A rating |
| Bath and North East Somerset Council | BATH | A rating |
| Bath And North East Somerset Third Sector Group CIO | Bath | A rating |
| Bath and West Finance Ltd | Bristol | A rating |
| Bath Best Food Ltd | Bath | A rating |
| Bath College | Bath | A rating |
| Bath Cricket Club | Bath | A rating |
| BATH EXPRESS LTD | Walcot, Bath | A rating |
| BATH FLOW (UK) LIMITED | Hillingdon | A rating |
| Bath Investment and Building Society | Bath | A rating |
| Bath Islamic Society Ltd. | Bath | A rating |
| Bath Professionals Limited | Luton | A rating |
| BATH ROAD STORES | STROUD | A rating |
| Bath Road Surgery | Hounslow | A rating |
| Bath Road Tyres Ltd | Slough | A rating |
| Bath Rugby Limited | Bath | A rating |
| Bath Soft Cheese Co | Bath | A rating |
| Bath Spa University | Bath | A rating |
| Bath Sushi | Bath | A rating |
| BATHGATE HOUSE LIMITED | BATHGATE | A rating |
| Bathing under the Sky ltd | Royston | A rating |
| Bathroom Bubbles Ltd | West Bromwich | A rating |
| Bathroom City Limited | Birmingham | A rating |
| BATHROOM JUNCTION LTD | Birmingham | A rating |
| Bathroom Team Ltd | Swindon | A rating |
| BathroomsByDesign Retail Ltd | Brentford | A rating |
| Bathu Super Store Limited | Lewisham | A rating |
| Batley Cafe Ltd trading as Chaiiwala | Batley | A rating |
| BATLEY CRICKET CLUB | BATLEY | A rating |
| Batley Multi Academy Trust | Batley | A rating |
| BATMAN LTD | Basildon | A rating |
| Baton House Enterprises Limited | Huddersfield | A rating |
| Baton Systems Limited | Elstead | A rating |
| Batra Associates Ltd | West Bromwich | A rating |
| Batra Newsbox Limited | London | A rating |
| BATREE UK LTD | Slough | A rating |
| Batt Laboratories Ltd | Coventry | A rating |
| Battelle UK limited | chelmsford | A rating |
| Batten & Allen | Cirencester | A rating |
| Battersea Arts Centre | London | A rating |
| Battersea Bridge House Limited | London | A rating |
| Battersea Fields Practice | Battersea | A rating |
| Battersea Power Station Development Company Limited | London | A rating |
| Battersea Primary Care Ltd | Battersea | A rating |
| Battersea Project Phase 3A Hotel Operational Company Limited | London | A rating |
| Batth Building Ltd | Hayes | A rating |
| Battle Systems Ltd | Redditch | A rating |
| battleface Insurance Services Limited | West Malling | A rating |
| Battlefield Healthcare | Shrewsbury | A rating |
| Battlefront Miniatures Europe Ltd | Nottingham | A rating |
| Batu Lapan Limited | London | A rating |
| BATU PIPEWORK UK LTD | London | A rating |
| BATU TRAINING SERVICES LTD | LONDON | A rating |
| BAU Hair Design Ltd | Edinburgh | A rating |
| BAUDDHA LTD | Watford | A rating |
| BAUER Equipment UK Limited | Rotherham | A rating |
| Bauer Media Outdoor International Limited | London | A rating |
| Bauer Radio Limited | Peterborough | A rating |
| Bauer Technologies Limited | Bishops Stortford | A rating |
| Baufortt Limited T/A Pepe's Piri Piri | London | A rating |
| Baufritz (UK) Ltd | Cambridge | A rating |
| Bauhaus Educational Services Limited | Northampton | A rating |
| Baumlink Ltd. | London | A rating |
| BAUMONT REAL ESTATE CAPITAL LIMITED | LONDON | A rating |
| Baumuller UK Ltd | Stockport | A rating |
| Bausch & Lomb UK Limited | Kingston Upon Thames | A rating |
| Bav Golkonda Ltd | London | A rating |
| BAVANI CARE HOME LIMITED | RAYNESPARK | A rating |
| Bavanmore Farm Ltd | Newry | A rating |
| BAVASUTHAN SELVANAYAGAM T/A COSTCUTTER ?¢???? WINCOBANK | SHEFFIELD | A rating |
| BAWA FORECOURTS LTD | Haywards Health | A rating |
| BAWA KITCHEN LIMITED T/A BAWARCHI RESTAURANT | Glasgow | A rating |
| BAWAG P.S.K. INTERNATIONAL | London | A rating |
| Bawer Limited | London | A rating |
| BAWNBUA FOODS NI LTD | LURGAN | A rating |
| Baxall Construction Ltd | Paddock Wood | A rating |
| Baxi Heating UK Limited | Warwick | A rating |
| Baxle Ltd | Essex | A rating |
| Baxter Games Newcastle Limited | Newcastle upon Tyne | A rating |
| Baxter Healthcare Limited | Reading | A rating |
| BAXTER OPCO LTD T/A KIP HOTEL | LONDON | A rating |
| Baxters Homecare LTD | Slough | A rating |
| Baxterstorey Limited | Reading | A rating |
| BAY CAPITAL PARTNERS UK LIMITED | London | A rating |
| Bay Care Domiciliary Care Limited | Paignton | A rating |
| Bay Collective UK Limited | London | A rating |
| Bay Court Residential & Nursing Home | Budleigh Salterton | A rating |
| Bay Horse Totnes Ltd | Totnes | A rating |
| BAY HOUSE | BEXHILL-ON-SEA | A rating |
| Bay Immigration Law Ltd | London | A rating |
| Bay Leaf Restaurant | Glasgow | A rating |
| Bay Leaves KT19 LTD | Epsom | A rating |
| BAY MEDICAL GROUP | MORECAMBE | A rating |
| BAY OF BENGAL (UK) LIMITED T/a Bay of Bengal Restaurant | Sheffield | A rating |
| Bay Spice Tandoori Limited | Torquay | A rating |
| Bay Tree Veterinary Centre Limited | Stourport | A rating |
| Bay Vets Limited | Lancaster | A rating |
| BAYA DYNAMICS LTD. | LONDON | A rating |
| Baya Systems Limited | Cambridge | A rating |
| Bayar Hughes & Co | London | A rating |
| BAYATI SERVICES LIMITED | London | A rating |