| Wootton Vale Healthy Living Centre | Wootton | A rating |
| WOOTZWORK LABS LIMITED | Teddington | A rating |
| Woozle Research Limited | London | A rating |
| Worcester 1 Limited T/A Pepe's Piri Piri | WORCESTER | A rating |
| Worcester Care Services Ltd | Worcester | A rating |
| Worcester Carsales Ltd T/A Ludlow Motors | Ludlow | A rating |
| Worcester Cricket Club | Worcester | A rating |
| Worcester Elite Travel Ltd | Worcester | A rating |
| Worcester Fleet Management Ltd | Bromsgrove | A rating |
| WORCESTER FOOD & BEVERAGES LIMITED | England | A rating |
| Worcester Garden No1 Ltd | Clevedon | A rating |
| Worcester Lettings and Devlopments Limited | Worcester | A rating |
| WORCESTER PARK POST OFFICE | Worcester Park | A rating |
| Worcester Podiatry Limited | Worcester | A rating |
| Worcester Therapy Group | Worcester | A rating |
| Worcestershire Acute Hospitals NHS Trust | Worcester | A rating |
| Worcestershire County Council | Worcester | A rating |
| Worcestershire County Cricket Club | Worcester | A rating |
| WORD OF HOPE BIBLE CHURCH | MANCHESTER | A rating |
| Word of Life Church Ashington | Ashington | A rating |
| Word of Life Ministries (London and Birmingham) | London | A rating |
| Word of Life Ministries UK Limited | Wellingborough | A rating |
| WORD OF LIGHT INTERNATIONAL MINISTRIES LTD | NEWPORT PAGNELL | A rating |
| Word of mouth dental care | Ilford | A rating |
| Word on the Curb Ltd | London | A rating |
| Word Practitioners Ministry | Basildon | A rating |
| Word360 Ltd | Edgbaston | A rating |
| Wordbank Marketing Limited | London | A rating |
| Words and Pixels PR Ltd | London | A rating |
| Words First Limited | Kenley | A rating |
| Wordsearch Communications Ltd | London | A rating |
| Wordsley Spice Ltd | Stourbridge | A rating |
| Wordsmith AI Ltd | London | A rating |
| WORDSWORTH HEALTH CENTRE | LONDON | A rating |
| Wordwatch Limited | London | A rating |
| Worfield Cricket Club | Bridgnorth | A rating |
| WORK CENTRE LTD | London | A rating |
| Work Experience Ltd | Poole | A rating |
| WORK FROM HOME GLOBAL LTD | Radlett | A rating |
| Work It Group Ltd | Old Hatfield | A rating |
| WORK LIMITED | London | A rating |
| Work Nexus Labs Limited | Altrincham | A rating |
| Work Permit Services Ltd | GLASGOW | A rating |
| Work Place Media Limited | Derby | A rating |
| WORK POINT MOTORS LTD | Accrington | A rating |
| Work Rights Centre (WORC) | London | A rating |
| Work Stress Management LTD (Trading as Wellbeing Solutions) | London | A rating |
| Work Work Ltd | London | A rating |
| Work Zone Construction (UK) Ltd | London | A rating |
| Work.Life Holdings Limited | London | A rating |
| Work2gether Limited | Southall | A rating |
| Workable Software Limited | London | A rating |
| Workato UK Ltd | London | A rating |
| WorkBoard UK | London | A rating |
| Workbooks Online Limited | Reading | A rating |
| WorkBuzz Analytics Limited | Milton Keynes | A rating |
| Workday (UK) Limited | London | A rating |
| Workers-direct Limited | Ilford | A rating |
| WorkFin Ltd | Leicester | A rating |
| Workflo Solutions Scotland Ltd | Livingston | A rating |
| Workflow Design Limited | London | A rating |
| Workflow Doctor Ltd | Bath | A rating |
| Workflow Management Limited | Exeter | A rating |
| Workforce Employment Solutions Limited | London | A rating |
| Workforce HCM Limited | London | A rating |
| WORKFORCE PEOPLE SOLUTIONS LTD | BOLTON | A rating |
| WORKFORCE RECRUITMENT SOLUTIONS LTD | Manchester | A rating |
| WorkForce Software Limited | Milton Keynes | A rating |
| Workforce Training & Development Ltd | London | A rating |
| Workfox UK Ltd | Ipswich | A rating |
| Workheath Heat Treatment LTD | Loughborough | A rating |
| Working Capital Advisors (UK) Ltd | London | A rating |
| Working Kitchens Limited | London | A rating |
| Working Well Trust | London | A rating |
| Working Word Public Relations Limited | Cardiff | A rating |
| Workington Cricket Club | Workington | A rating |
| Workington Specsavers Ltd T/A Specsavers Opticians | Workington | A rating |
| Workington Town RLFC Ltd | Workington | A rating |
| Workiva UK Ltd | London | A rating |
| Worklifewell Healthcare Ltd | Harrow | A rating |
| Worklio Ltd | London | A rating |
| Workpays | Derby | A rating |
| WORKPEACH UK LTD | Romford | A rating |
| Workplace Fabric Limited (Trading as Freespace) | Rickmansworth | A rating |
| Workplace Health Solutions Ltd | London | A rating |
| Workplace Interiors Company Cheltenham Limited | Cheltenham | A rating |
| WORKPLACE OPTIONS LIMITED | LONDON | A rating |
| Workpower Limited | Coventry | A rating |
| Workrate Security Limited | Leeds | A rating |
| Works International Design Ltd | Leeds | A rating |
| Workshare Limited | Kingston Upon Thames | A rating |
| WORKSHOPIX LTD | London | A rating |
| Workshops At Schools | ASHBOURNE | A rating |
| WORKSOLV LTD | Manchester | A rating |
| Worksome Ltd | London | A rating |
| WORKSOP AND RETFORD HOUSING PROJECT LIMITED T/A NEW ROOTS | Worksop | A rating |
| Workspace Group PLC | London | A rating |
| WORKWEAR & PPE SUPPLIES LTD | AIRDRIE | A rating |
| Workwell People Solutions Ltd | Watford | A rating |
| World Adventures Limited | London | A rating |
| World Animal Protection | London | A rating |
| World Asia Logistics Ltd | Feltham | A rating |
| World Association of Girl Guides & Girl Scouts | London | A rating |
| World Association of Nuclear Operators | London | A rating |
| WORLD BI LIMITED | London | A rating |
| World Brands Duty Free Ltd | London | A rating |
| World By World UK Limited | Staines | A rating |
| WORLD CARE FOUNDATION | Edinburgh | A rating |
| WORLD CLASSICAL MUSIC LTD | Wembley | A rating |
| World Coal Association | Kingston | A rating |
| World Communications (2002) Limited | Gosport | A rating |
| World Compassion Trust | PONTYCLUN | A rating |
| World Confederation for Physical Therapy | London | A rating |
| WORLD COUNCIL OF HINDUS U.K. | Ilford | A rating |
| World Decor Supplies Limited | Nottingham | A rating |
| World Drilling Supplies Limited | Preston | A rating |
| World Energy Council | London | A rating |
| World Excellence Awards Ltd | Tunbridge Wells | A rating |
| World Federation of Advertisers-UK | London | A rating |
| World First UK Limited | London | A rating |
| WORLD FLYER UK LTD | Redditch | A rating |
| World Food & Drinks Limited | Colchester | A rating |
| WORLD FOOD RESTAURANT LIMITED | Chelmsford | A rating |
| World Food Trading Meat Ltd | Manchester | A rating |
| World Foods Distribution Ltd | Luton | A rating |
| World Foods T/B MOMINUL HUDA MUHIN | BEDFORD | A rating |
| World Fuel Services Europe Limited | London | A rating |
| World Gourmet Restaurant Limited | London | A rating |
| World Harvest (UK) | Harrow | A rating |
| World Hepatitis Alliance | London | A rating |
| World Horizons | Llanelli | A rating |
| World in Motion Limited | London | A rating |
| World Jewish Relief | London | A rating |
| World Land Trust | Halesworth | A rating |
| World Learning Academy Limited t/a Galaxy Tuition | London | A rating |
| World Leisure Developments Ltd. | Northwood | A rating |
| WORLD LINK TRAVELS LIMITED | Reading | A rating |
| World Link Wholesale Limited | Alperton | A rating |
| World Machinery (Shropshire) Limited | Bridgnorth | A rating |
| World Makers Limited | London | A rating |
| World Memon Organisation Charitable Foundation | London | A rating |
| WORLD METAL RECYCLING LIMITED | Coventry | A rating |
| World Mission Agency-Winners Chapel International | Dartford | A rating |
| WORLD MISSION SOCIETY CHURCH OF GOD | EPSOM | A rating |
| World Nuclear Association | London | A rating |
| World Nuclear Transport Ltd | London | A rating |
| World of Books Group Limited | Goring By Sea | A rating |
| World of Clowns Ltd | Swindon | A rating |
| WORLD OF COMMUNICATION LTD | Amersham | A rating |
| World Of Jewels Limited | London | A rating |
| World of Shawls Ltd | Barking | A rating |
| WORLD OPTIONS LTD | Accrington | A rating |
| World ORT Trust | London | A rating |
| WORLD PHONE ACCESSORIES LTD | Chichester | A rating |
| World Professional Billiards & Snooker Association | Bath | A rating |
| World Rugby Services UK Limited | London | A rating |
| WORLD SAILING UK LTD | LONDON | A rating |
| World Shipping Council Limited | London | A rating |
| World Shirdi Sai Baba Organisation (UK) | London | A rating |
| World Sport Ministries | Bath | A rating |
| World Star Aviation Limited | London | A rating |
| World Tax Services UK Limited | Altrincham | A rating |
| World Team (UK) T/A The Meeting Point | London | A rating |
| WORLD TECH CONSULTANTS LTD | Romford | A rating |
| World Trader Ltd | Sutton | A rating |
| WORLD TRAVEL & PRINTING | DERBY | A rating |
| World Travel & Tourism Council | London | A rating |
| World Travel Protection Limited | Uxbridge | A rating |
| World Vision International Global Centre | Uxbridge | A rating |
| World Vision UK | Milton Keynes | A rating |
| World Waterside Ltd t/a RiverHomes | London | A rating |
| World Wide Services Limited | Bury | A rating |
| WORLD WIDE SHOES LLP | London | A rating |
| World Wise Foods Ltd. | Ascot | A rating |
| World Wrestling Entertainment (International) Limited | London | A rating |
| WORLD'S VEG LTD | Milton Keynes | A rating |
| WorldCC UK Ltd | Petersfield | A rating |
| Worldline IT Services UK Limited | Nottingham | A rating |
| Worldline IT Services UK Limited | Beeston | A rating |
| Worldlink Exports & Imports Ltd | Burnley | A rating |
| Worldlink Express Ltd | Feltham | A rating |
| Worldmodeldata Limited | Cambridge | A rating |
| WORLDONE RESEARCH LTD | London | A rating |
| WORLDOVER LTD | London | A rating |
| Worldpath Advisory Ltd | London | A rating |
| WorldPay (UK) Ltd | London | A rating |
| WORLDRADE ONLINE RETAIL LTD | London | A rating |
| WorldRemit Ltd | London | A rating |
| Worlds Better Ltd | Brighton | A rating |
| WORLDS BIGGEST PRODUCTIONS | GERRARDS CROSS | A rating |
| Worlds End Post Office and Stores | Burgess Hill | A rating |
| WORLDTECH CONSULTING LIMITED | CROYDON | A rating |
| WORLDVIEW UK LIMITED | London | A rating |
| WORLDWIDE BUSINESS RESEARCH LIMITED | LONDON | A rating |
| WORLDWIDE CHURCH OF THE POWER OF GOD | LONDON | A rating |
| WorldWide Clinical Trials | Nottingham | A rating |
| Worldwide Construction Limited | Willenhall | A rating |
| Worldwide DMC Ltd | London, Middlesex | A rating |
| Worldwide Education Recruitment | Langley | A rating |
| Worldwide Events Group Ltd | London | A rating |