Question: Larry is the 10 Downing Street, official resident cat of the Prime Minister of the UK, also called? 
Related documents: [0]  [DOC] The Chief Mouser to the Cabinet Office is the title of the official resident cat of the Prime Minister of the United Kingdom at 10 Downing Street. 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. There has been a resident Treasury or Downing Street cat employed as a mouser and pet since the reign of Henry VIII, when Cardinal Wolsey placed his cat by his side while acting in his judicial capacity as Lord Chancellor, an office he assumed in 1515. [END] 
[1]  [DOC] Larry is the 10 Downing Street cat and is Chief Mouser to the Cabinet Office. Larry is a brown and white tabby, believed to have been born in January 2007. By July 2016, when Theresa May became Prime Minister, Larry had developed a reputation of being "violent" in his interactions with other local mousers, namely the Foreign Office's much younger cat Palmerston. [END] 
Answer: 
Chief Mouser to the Cabinet Office
Chief Mouser to the Cabinet Office