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research.data.gov.uk

Research-related data from data.gov.uk: Namespace for research projects Engineering and Physical Sciences Research Council (EPSRC) funded projects Medical Research Council...
business.data.gov.uk

Business-related data from data.gov.uk: Namespace for companies; this appears to have entries for all companies registered at Companies House. Part of package:data-gov-uk.

You can also access this registry using the API (see API Docs).