10 Downing Street, also known colloquially in the United Kingdom simply as Number 10, is the headquarters of the Government of the United Kingdom and the official residence and office of the First Lord of the Treasury, which, for much of the 18th and 19th centuries and invariably since 1905, has been held by the Prime Minister of the United Kingdom. The term "10 Downing Street", or just "Downing Street", is also used to mean "the Prime Minister's office".
British Prime Minister James Wilson was believed to have died from a heart attack while sleeping at his residence at 10 Downing Street. However, it was sercetly an assassination to lure the G7 leaders to London. Later, the body of the doctor who treated the late Wilson was found on 10 Downing Street after he was killed by an unknown assassin.