| U & P Hughes Precision Engineers / UPHughesPrecisionEngineers |
| U - Net Uk Ltd / UNetUkLtd |
| U and Z Co Ltd / UandZCoLtd |
| U C L Hospitals N H S Trust / UCLHospitalsNHSTrust |
| U C S / UCS |
| U C S Building Division Ltd / UCSBuildingDivisionLtd |
| U C S Civils Ltd / UCSCivilsLtd |
| U Can Store It Ltd / UCanStoreItLtd |
| U Chaunch / UChaunch |
| U Control Ltd / UControlLtd |
| U Design / UDesign |
| U E & R Down / UERDown |
| U F C C / UFCC |
| U G Food (U.K) Ltd / UGFoodUKLtd |
| U International Ltd / UInternationalLtd |
| U Joseph / UJoseph |
| U K Axles / UKAxles |
| U K B S Plc / UKBSPlc |
| U K Centre for Economic & Environmental Development / UKCentreforEconomicEnvironmentalDevelopment |
| U K Concrete Pumping Ltd / UKConcretePumpingLtd |
| U K Fastener Supplies / UKFastenerSupplies |
| U K Golf Services Ltd / UKGolfServicesLtd |
| U K Industrial Supplies Ltd / UKIndustrialSuppliesLtd |
| U K Inks Ltd / UKInksLtd |
| U K Installations Ltd / UKInstallationsLtd |
| U K Net 1 Ltd / UKNet1Ltd |
| U K Pine / UKPine |
| U K Plastics Ltd / UKPlasticsLtd |
| U K Play 2 / UKPlay2 |
| U K R Transmissions Ltd / UKRTransmissionsLtd |
| U K Roofing & Building / UKRoofingBuilding |
| U K Site Painters Ltd / UKSitePaintersLtd |
| U K Systems Inc Ltd / UKSystemsIncLtd |
| U K Track & Pitch Ltd / UKTrackPitchLtd |
| U Khan / UKhan |
| U P Fashions / UPFashions |
| U P M Raflatac Ltd / UPMRaflatacLtd |
| U P M-Kymmene Wood Ltd / UPMKymmeneWoodLtd |
| U P V C / UPVC |
| U R B Bearings Distribution (U K) Ltd / URBBearingsDistributionUKLtd |
| U R S Europe Ltd / URSEuropeLtd |
| U R Success Ltd / URSuccessLtd |
| U Refill Toner Ltd. / URefillTonerLtd |
| U S Electronics / USElectronics |
| U S H (U K) Ltd / USHUKLtd |
| U V Fish Ltd / UVFishLtd |
| U View Data Ltd / UViewDataLtd |
| U-Bag / UBag |
| U-Bake Ltd / UBakeLtd |
| U-Clean Ltd / UCleanLtd |