Islington Business by letter: u
- U C K G Help Centre, Islington
- U C M Ltd, Islington
- U S A Fashion, Islington
- Uffindell West, Islington
- UK Detective, Islington
- UK N G O Aids Consortium, Islington
- UK Solution Systems Ltd, Islington
- UK Youth Parliament, Islington
- Ukrainian Information Service Ltd, Islington
- Ultra Nova Coding, Islington
- Ultrasound Blind Cleaners, Islington
- Umano Jewellery, Islington
- Umbrella, Islington
- Umbrella Design, Islington
- Under One, Islington
- Undercurrents, Islington
- Underwired, Islington
- Unicorn Asset Management, Islington
- Unicorn Theatre For Children, Islington
- Uniglobe Topflight Travel, Islington
- Unigraph, Islington
- Unika Vaev, Islington
- Union Chapel Project, Islington
- Union Of Muslim Families, Islington
- Union Tavern, Islington
- Unique, Islington
- Unique Digital Marketing, Islington
- Unique Environment, Islington
- Unique Sound & Vision, Islington
- Unitarian Church, Islington
- United Clearing, Islington
- United Shipping Services Ltd, Islington
- United Workspace Ltd, Islington
- Unity Performing Arts, Islington
- Universal Industries, Islington
- Universal Lighting Specialists Ltd, Islington
- Universal Newsagent, Islington
- Universities Of Ghana, Islington
- University Plaice Fish Bar, Islington
- UnLtd, Islington
- Unwins Wine Merchants, Islington
- Unwins Wine Merchants, Islington
- Upfront, Islington
- Upper Class Menswear Ltd, Islington
- Upper Street Fashions, Islington
- Upper Street Multicultural Counselling Centre, Islington
- Upper Street Sandwich Bar, Islington
- Upstage Theatrical Dry Cleaners, Islington
- Upstairs, Islington
- Upstream, Islington
- Urban Attitude (UK) Ltd, Islington
- Urban Design Alliance, Islington
- Urban Design Group, Islington
- Urban Explorers Ltd, Islington
- Urban Forum, Islington
- Urban Hype Consultancy, Islington
- Urban Lily Ltd, Islington
- Urban Living, Islington
- Urban Mesh Design, Islington
- Urban Practitioners, Islington
- Urban Spaces, Islington
- Urban Star Records Ltd, Islington
- Urbanity Ltd, Islington
- USA Fashions, Islington
- Usher Bros Electrical, Islington
- Ushida Findlay Architects, Islington