The Chief Mouser to the Cabinet Office is the title of the official resident cat, of the Prime Minister of the United Kingdom, which tabby cat, with this title, is owned by the former Chancellor of the Exchequer of the United Kingdom George Osborne and his family?
Chief Mouser to the Cabinet Office:  Only four cats, Humphrey, Sybil, Larry and Freya have been given the title officially; other cats were given this title affectionately, usually by the British press. Freya (cat): Freya (born c. April 2009) is a tabby cat owned by the former Chancellor of the Exchequer of the United Kingdom George Osborne and his family.
Freya