| Turnstar Systems GB Ltd | Radcliffe | A rating |
| Turnstile Group Limited | London | A rating |
| Turnstone Construction Ltd | London | A rating |
| Turntabl Limited | London | A rating |
| Turntide Drives Ltd | Gateshead | A rating |
| TURON LIMITED | BOURNMOUTH | A rating |
| TuroUK Ltd | London | A rating |
| Turpin & Miller LLP | Oxford | A rating |
| Turpin Fitness CF Limited T/A CrossFit Henleaze | Bristol | A rating |
| Turquoise International Limited | London | A rating |
| Turquoise Jewellery Ltd | London | A rating |
| Turrell Family Properties LTD | Swansea | A rating |
| Turret Orthodontics Limited | Sale | A rating |
| Turret Villa Retirement Home Limited | Northumberland | A rating |
| Turtl Surf & Immerse Limited | London | A rating |
| Turtle Bay Hospitality Limited T/A Turtle Bay | Bristol | A rating |
| TURTLE CARS LTD | London | A rating |
| Turtle Trans Logistics Ltd | London | A rating |
| TURTLE TRANSPORT U.K. LIMITED | Bilston | A rating |
| Turtle Wax Europe Limited | Liverpool | A rating |
| TUSCAWILLA CARE GROUP LTD | Crayford | A rating |
| TUSHIL PRIVATE LTD | Southampton | A rating |
| Tuskan Thai Limited | Norwich | A rating |
| TUSKER CONTRACTS NI LIMITED | NEWRY | A rating |
| Tusker House | Hastings | A rating |
| Tuspark Holdings (UK) Limited | Cambridge | A rating |
| Tutelage Care Hatley Ltd | Ilford | A rating |
| Tutelage Care Redbridge Ltd | Redbridge | A rating |
| Tutis Estates | Coventry | A rating |
| TUTOR HUB ONLINE LIMITED | Bradford | A rating |
| Tutor The Nation | London | A rating |
| TutorChase Ltd | London | A rating |
| TutorCruncher Ltd | London | A rating |
| Tutors and Exams Limited | Coventry | A rating |
| Tutors International Ltd | Oxford | A rating |
| Tutt (Coventry) Limited | Birmingham | A rating |
| TUTU VIEW LTD | London | A rating |
| TUV Rheinland UK Ltd | Shirley | A rating |
| TUV SUD Limited | Fareham | A rating |
| TÜV UK LTD | CROYDON | A rating |
| TUZIOS LIMITED | Liverpool | A rating |
| TV Asahi London Bureau | London | A rating |
| TV CONTROL LTD | London | A rating |
| TV Tokyo Corporation London Bureau | London | A rating |
| TVA INTERNATIONAL LTD | R | A rating |
| TVA Technology Ltd t/a Electricshop | Potters Bar | A rating |
| TVDROM LIMITED | London | A rating |
| TVF Limited | London | A rating |
| TVG (Angus) Ltd | Kirriemuir | A rating |
| TVG Llandysul Ltd T/A Tysul Vets | Llandysul | A rating |
| TVG Media Ltd | Bristol | A rating |
| TVISHA ENTERPRISE LIMITED T/A AMORE DESSERT CAFE | PINNER | A rating |
| TVision Technology Ltd | Woking | A rating |
| TVM UK Animal Health Limited | Kirtlington | A rating |
| TVR Services Ltd | Bristol | A rating |
| TVS INTERFLEET LIMITED | Wisbech | A rating |
| TVS Lincolnshire Ltd T/A Blossom Home Care Lincolnshire | Grimsby | A rating |
| TVS Motor Company Limited UK Branch | Kenilworth | A rating |
| TVS SCS IFM LIMITED | Chorley | A rating |
| TVS Supply Chain Solutions | Chorley | A rating |
| TVS TRADING LTD T/A HENLEY NEWS FOOD & WINE | COVENTRY | A rating |
| TVSL GROUP LTD | LONDON | A rating |
| TVSquared Ltd. | Edinburgh | A rating |
| TW 24/7 Cars LTD | Kent | A rating |
| TW Convenience Ltd | Radcliffe | A rating |
| TW Fabrications Structures Limited | Preston | A rating |
| TW FOOD COURT LTD - TRADING AS MENARA LOUNGE | HOUNSLOW | A rating |
| TW INTERNATIONAL LTD | ILFRACOMBE | A rating |
| TW Metals Ltd | Southampton | A rating |
| TW Scott & Sons (fuels) Limited | Omagh | A rating |
| TW12Pub Limited T/a The Duke of Clarence | Hampton | A rating |
| TW141 Ltd trading as Top Wok | Dorset | A rating |
| Twaraa Technology and Services Limited | Stanmore | A rating |
| TWB CAMBS LTD | Peterborough | A rating |
| TWD Glasgow Limited | Glasgow | A rating |
| Tweed Chiropractic Limited | Galashiels | A rating |
| TWEED DENTAL CLINIC | BERWICK ON TWEED | A rating |
| Tweed House Ltd | Leeds | A rating |
| tweedmouth house | berwick upon tweed | A rating |
| Tweedshot Gundogs Limited | Richmond | A rating |
| Tweendykes Wines | Hull | A rating |
| Tweenhills Farm and Stud Limited | Glouceser | A rating |
| Twelfth Man Limited | London | A rating |
| Twelve Architects Ltd | London | A rating |
| Twelve Oaks Software Ltd | York | A rating |
| TWELVE SERVICES LTD | Slough | A rating |
| Twelve Wings Limited t/a Wingers | Derby | A rating |
| Twelvers Connect Ltd T/A New Milton Pharmacy | New Milton | A rating |
| Twelvers Link Limited | Fordingbridge | A rating |
| Twenty 1 Construction Ltd | London | A rating |
| Twenty Below Music Limited | London | A rating |
| TWENTY FIFTH AVENUE LTD | London | A rating |
| Twenty First Group Limited | London | A rating |
| Twenty One Engineering | Great Dunmow | A rating |
| Twenty Third C Limited | Richmond | A rating |
| Twenty VC LLP | London | A rating |
| Twenty20 Software Limited | Horsham | A rating |
| TWENTYFIFTY LTD | Frome | A rating |
| TwentyFirstCenturyBrand Ltd | London | A rating |
| TwentyFiveM Limited | Leeds | A rating |
| TwentyFour Asset Management LLP | London | A rating |
| TwentyFour IT Services Limited | Doncaster | A rating |
| TWENTYFOUR-7 HEATING & PLUMBING LTD | LUTON | A rating |
| Twentyfour7 Stop | Benfleet | A rating |
| Twentynine Palms Ltd | London | A rating |
| TwentyOneDental | Brighton & Hove | A rating |
| TwentyTwo Real Estate Partners Ltd | London | A rating |
| TWFVP Limited | Romford | A rating |
| TWG CADILLAC FORMULA 1 TEAM LIMITED | Silverstone | A rating |
| TWG Global Services UK Ltd | London | A rating |
| TWI Ltd | Cambridge | A rating |
| TWICE AS NARCE LIMITED (Narce Media) | Birmingham | A rating |
| TWICKENHAM DENTAL CARE LTD | TWICKENHAM | A rating |
| Twickenham Film Studios Limited | Greater London | A rating |
| TWICKENHAM FOOD LTD | Twickenham | A rating |
| TWICKENHAM RESTAURANTS LTD | TWICKENHAM | A rating |
| Twig | London | A rating |
| Twig Education Ltd | Glasgow | A rating |
| Twigs Nurseries LLP | Buckingham | A rating |
| Twiice Clothing Limited | London | A rating |
| TWILIGHT ENGINEERING SOLUTIONS LTD | Edinburgh | A rating |
| Twilight Health & Homecare Services Ltd | Wolverhampton | A rating |
| Twilight UK Limited | Birmingham | A rating |
| Twilight Years Limited | Barrow in Furness | A rating |
| Twilio UK Limited | London | A rating |
| TWIN AND EARTH LIMITED | Towcester | A rating |
| TWIN CLOTHING U.K. LIMITED | London | A rating |
| Twin Dots Limited | Newmarket | A rating |
| Twin Group | London | A rating |
| TWIN INTERNATIONAL | Kingston Upon Thames | A rating |
| Twin Ventures International Ltd | London | A rating |
| Twin Wholesale Limited | London | A rating |
| Twinfix Limited | Warrington | A rating |
| Twinglobe Care Ltd | Enfield | A rating |
| Twinic Ltd | Grantham | A rating |
| Twinkle Star Trading Ltd | Oxford | A rating |
| Twinkle Stars Nursery School Ltd | Wembley | A rating |
| TWINKLE STUDIO LIMITED | Sheffield | A rating |
| Twinkle Toes Day Nursery LTD | London | A rating |
| Twinkle Twinkle Red Star Limited | Kent | A rating |
| Twinklers Ltd | LONDON | A rating |
| TWINKLESTARS MONTESSORI NURSERY LTD | St Albans | A rating |
| TwinkleTwinkle Montessorri | Manchester | A rating |
| Twinning Solutions LTD | COVENTRY | A rating |
| Twintec Projects Limited | Rugby | A rating |
| Twipes Limited | London | A rating |
| TWIRL TECHNOLOGIES LTD | London | A rating |
| Twist & Loop Ltd | London | A rating |
| Twist Connubio Ltd | London | A rating |
| Twist Lane Garage Ltd | Leigh | A rating |
| Twist Solutions Ltd | London | A rating |
| Twisted Fish Limited | Twickenham | A rating |
| Twisted Hygiene & Packaging Ltd | Glasgow | A rating |
| TWK Ltd | Aylesbury | A rating |
| TWK Media Ltd | London | A rating |
| Two | Leatherhead | A rating |
| TWO ACE CONSULTANTS LIMITED | Rugby | A rating |
| Two B2B Ltd | London | A rating |
| Two Belly | Bristol | A rating |
| Two By Two Veterinary Group Limited | London | A rating |
| Two Can Talk Speech and Language Therapy | Mildenhall | A rating |
| Two Circles Limited | London | A rating |
| Two Create Studio Limted | London | A rating |
| Two Eds Ltd | London | A rating |
| Two Fifty Four Limited | Woking | A rating |
| Two Hungry Boys Limited | London | A rating |
| Two Legacy Partners Limited | London | A rating |
| Two Little Pigs Ltd | Stroud | A rating |
| Two Men and a Lady Limited | London | A rating |
| Two Mile Ash Food & Wine Limited | Milton Keynes | A rating |
| Two Oceans Limited T/A Cafe Zen | Burton on Trent | A rating |
| Two Pahadi 22 Limited, t/a Red Lion | Southampton | A rating |
| TWO POINT THAI LTD | London | A rating |
| Two Rivers Medical Centre | Ipswich | A rating |
| Two Sigma International Limited | London | A rating |
| TWO SIGMA LTD | London | A rating |
| Two Steaks Ltd | Luton | A rating |
| TWO THAI LIMITED | LANCASTER | A rating |
| Two Way Talent Ltd | London | A rating |
| Two:D Limited | London | A rating |
| Twomuch Studio Ltd | London | A rating |
| TWOPLUSTWO COMMERCIAL SERVICES LIMITED | Ponteland | A rating |
| TwoTenOFour Investments Ltd | Weybridge | A rating |
| Twothreebird UK Ltd t/a ETA Services | London | A rating |
| TWP INTERNATIONAL LLC | Harrogate | A rating |
| TWS Design Limited | London | A rating |
| TWS Partners Limited | London | A rating |
| TWT UK PTY LTD | London | A rating |
| TWW Yacht Management Ltd | Smarden | A rating |
| TWW YACHTS LIMITED | LONDON | A rating |
| Twycross Zoo - East Midland Zoological Society Ltd | Atherstone | A rating |
| Twyford Care LTD | Derby | A rating |
| Twyford Church of England Academies Trust | London | A rating |
| Twyford Convenience Store Limited T/A Londis | Oxon | A rating |
| Twyford House Care Ltd | Newcastle under Lyme | A rating |
| Twyford Polo Club Limited | Reading | A rating |
| Twyford Village Stores Limited | Winchester | A rating |
| Twyzle Limited | Godalming | A rating |
| TX EH1 Ltd | Edinburugh | A rating |
| TXM Consult Ltd | Milton Keynes | A rating |