Officially, Britain's Chancellor of the Exchequer resides at number 11 on this street
The Prime 
Minister's official residence is 10 Downing Street; the Chancellor's .... On some 
occasions Number 11 has been occupied not by the Chancellor of the Exchequer 
but... [DOC] [TLE] 10 Downing Street - Wikipedia [PAR] 10 Downing Street, colloquially known in the United Kingdom as Number 10, is 
the headquarters of Her Majesty's Government and the official residence .....