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.
Deputy prime minister former Minister of Finance of Russia, Alexey Kudrin also serves as one of the deputies of the prime ministers or "vice-premiers". One or two of these deputy prime ministers may hold the title of a "First Deputy Prime Minister". The Russian federal law indicates that in accordance with the order established in advance, "one of the deputy prime ministers" may temporarily substitute for the Prime Minister in his or her absence. Customarily, however, it is to one of the "First" Deputy Prime Ministers that the prime-ministerial duties may be delegated. At the same time, in the case of Prime Minister's