HARRIS, KENNETH [MARGARET HILDA THATCHER, BARONESS THATCHER, LG, OM, PC, FRS (NÉE ROBERTS, 13 OCTOBER 1925 - 8 APRIL 2013) WAS A BRITISH CONSERVATIVE PARTY POLITICIAN WHO WAS PRIME MINISTER OF THE UNITED KINGDOM FROM 1979 TO 1990 AND THE LEADER OF THE CON - Thatcher