Prime minister leader, the incoming leader will usually be referred as "prime minister-in-waiting". An example or this situation was in 2016 in the United Kingdom when Theresa May was elected leader of the Conservative Party while David Cameron was still prime minister. Ukraine's constitution (1996) lists the powers, functions and duties of the Prime Minister of Ukraine. Most prime ministers in parliamentary systems are not appointed for a specific term in office and in effect may remain in power through a number of elections and parliaments. For example, Margaret Thatcher was only ever appointed prime minister on "one" occasion, in 1979. She
Deputy Prime Minister of the United Kingdom Tyne. William Whitelaw was Margaret Thatcher's "de facto" deputy from 1979–1988, an unofficial position he combined with that of Home Secretary in 1979–1983 and Leader of the House of Lords after 1983. Sir Geoffrey Howe was bestowed the title of Deputy Prime Minister by Thatcher in 1989, on being removed from the post of Foreign Secretary. He resigned as her deputy in 1990, making a resignation speech that is widely thought to have hastened Thatcher's downfall. Thatcher's successor John Major did not appoint a Deputy Prime Minister until 1995, when Michael Heseltine was given the post. John Prescott, who was