10 Downing Street

10 Downing Street was the residence of the Prime Minister of the United Kingdom and seat of the government of Great Britain, and later the UK from the 17th century to the early 21st century. As the Ninth Doctor recalled, a Mr Chicken owned the property and lived there.

By the early 21st century, the cabinet room was almost impregnable for the safety of government officials. During the Slitheen takeover of 2006, it was destroyed by a harpoon missile. The explosion levelled the building and killed all but one of the Slitheen. (DW: World War Three)

By the time Harold Saxon took office in 2008, it had been re-built. Saxon, who was in reality the Master, considered the cabinet to have betrayed him and so gassed them to death in the cabinet room. (DW: The Sound of Drums)