Baroness Thatcher was the first woman to be UK prime minister, winning three elections Former Prime Minister Baroness Thatcher has died "peacefully" at the age of 87 after suffering a stroke while staying at the Ritz hotel in central London. David Cameron called her a "great Briton" and the Queen spoke of her sadness at the death. Lady Thatcher was Conservative prime minister from 1979 to 1990. Sh