1:08 Margaret Thatcher's Final Speech from No. 10 Downing Street (November 28th, 1990) 3:54 A brief history of Downing Street | Red Box 1:24 David Cameron welcomes Lady Thatcher to Downing Street 0:38 Margaret Thatcher resignation speech in 1990 - Daily Mail 0:56 Hilarious moment Downing Street policeman knocks on Number 10 to let Larry cat in