During World War II, Winston Churchill's brother lived in 10 Downing Street.

Strange but true. John Churchill and his older brother Winston were very close; and he and his children spent a lot of time with his brother's family at Chartwell and other residences. During World War II, the widowed John lost his house during the Blitz and he lived in 10 Downing Street. He lived in either No 10 (where he used the bedrooms on the top floor formerly used by Prime Minister Winston Churchill and his wife) or the No 10 Annex.