Royal Mail is the government-owned postal service in the United Kingdom of Great Britain and Northern Ireland. Royal Mail Holdings plc owns Royal Mail Group Limited, which in turn operates the brands Royal Mail (letters) and Parcelforce Worldwide (parcels). Post Office Ltd. (counters) andGeneral Logistics Systems, an international logistics company, are wholly owned subsidiaries.
Royal Mail Holdings is a public limited company in which the Secretary of State for Business, Innovation and Skills owns 50,004 ordinary shares plus 1 special share, and the Treasury Solicitor holds 1 ordinary share.
Info gleaned from Wikipedia