- U Hotels and Resorts
- U-Thrive
- Uber Kids
- Udder Covers
- UFC UK
- Ugg Australia
- UK 1 Cuff Links
- UK Flooring Direct
- UK Meet and Greet
- UK Office Direct
- UK Open College
- UK Paintball
- UK Park and Ride
- UK Sport Imports
- UK Theatre Tickets
- UK Tickets
- UK Tights
- UK Tool Centre
- UK Virtual College
- UK Water Features
- UK2
- ukbathroomstore.co.uk
- UKHost4u
- UKSoccershop
- UKSoccershop
- UKtights
- Ulster Weavers Home Fashions
- Ultimate Outdoors
- Ultralife
- UltraLife Shop
- UNA Hotels
- Under U
- Undercover Experience
- Unineed
- UNIQLO
- Unique Magazines
- Unique Menswear
- Unique Produce
- Universal Contour Wrap
- Universal Textiles
- University of hair
- Untitled
- Unwins Seeds and Plants
- Uppal Interiors
- Urban Adventures
- Urban Adventures
- Urban Alpha
- Urban Celebrity
- Urban Cove
- Urban Eclectic
- Urban Excess
- Urban Industry
- Urban Social
- Urban Surfer
- Urban-Allotments
- USN UK
- Utterly Personal