Many people are familiar with 10 Downing St, the Prime Minister's address. Next door is perhaps less well known. 11 Downing Street (commonly known as Number 11), is the official residence of Britain's Second Lord of the Treasury who is formally recognized as the Chancellor of the Exchequer. The first Chancellor to live there was Henry Petty-Fitzmaurice in 1806, but Number 11 did not become the Chancellor's official residence until 1828.


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More Info: en.wikipedia.org