sentences:  Thatcher's key ally in the party was Home Secretary, and later Deputy Prime Minister, William Whitelaw.His moral authority and support allowed her to resist the internal threat from the Heathite wets.After the Brixton riot in West London in April 1981, Employment Secretary Norman Tebbit, responding to a suggestion that rioting was caused by unemployment, observed that the unemployment of the 1930s was far worse than that of the 1980s—and that his father's generation never reacted by rioting.