UK businesses with information on different business activities and companies engaged in all kinds of services, management, distribution or products production are listed here.
Government Business - Offers UK specific business information and regulations, licences and contacts specific to your business area.
https://governmentbusiness.co.uk/
UK Department of Business - UK business department enabling UK companies to compete freely by fostering competitive markets.
https://www.gov.uk/government/organisations/department-for-business-innovation-skills