唐宁街十号，英国首相官邸（Number Ten的缩写）
written abbreviation for Number Ten
The reaction in No. 10 was one of unbridled fury.
She was head of the No. 10 Policy Unit.
Meanwhile, inside No. 10, the Prime Minister has lost another trusted aide.
This dramatic surge in support could catapult her into No. 10.
It's said that her remarks have infuriated No. 10.
His comments have fuelled speculation that the Prime Minister is set to quit No. 10 before the year is out.
See also: no.