Parliamentary Private Secretary to the Prime Minister Bonar Law's Parliamentary Private Secretary, J.C.C. Davidson acted in effect as his Chief of Staff. Margaret Thatcher's downfall from the Conservative Party leadership in 1990 is attributed by many to the actions of her Parliamentary Private Secretary, Peter Morrison, in failing accurately to count votes amongst Conservative backbenchers. Some Parliamentary Private Secretaries to the Prime Minister go on to hold higher office; Lord Dunglass served as Parliamentary Private Secretary under Neville Chamberlain and later went on to serve as Prime Minister in his own right. There can be multiple Parliamentary Private Secretaries to the Prime Minister at a given time.
Prime Minister of New Zealand of the few countries in the world to have had three female heads of government, and one of only three countries to have had a female head of government directly succeed another. The first female prime minister was Jenny Shipley of the National Party, who replaced Jim Bolger in late 1997; Shipley was succeeded by Helen Clark in 1999. Jacinda Ardern, the second female leader of the Labour Party after Clark, became prime minister in 2017. On becoming the Colony of New Zealand in 1841, New Zealand was directly governed by a governor, appointed by the Colonial Office in Britain.