In her memoirs , Thatcher listed Lamont along with six other Cabinet ministers as a potential successor to her .
Shortly afterwards he successfully managed Major 's election campaign to succeed Margaret Thatcher as party leader and Prime Minister .
In Margaret Thatcher 's memoirs , Thatcher listed Lamont along with six other Cabinet ministers as a potential successor to her .
Shortly afterwards he successfully managed Major 's election campaign to succeed Margaret Thatcher as party leader and Prime Minister .