List of residents of 10 Downing Street
 Number 10 Downing Street is the residence and office of the First Lord of the Treasury and Prime Minister of the United Kingdom. The headquarters of Her Majesty's Government it is situated on Downing Street in the City of Westminster in London England.Number 10 was originally three houses: a stately mansion overlooking St. James's Park called the house at the back built around 1530 a modest townhouse behind it located at 10 Downing Street and a small cottage next to Number 10.