in which the Conservatives (the largest party) and Liberal Democrats (the third-largest party) agreed to form the first coalition government since World War II. The third occurred shortly thereafter, in June 2017, when the Conservative Party lost its majority in a snap election, though the party remained in power as a minority government. Summons, prorogation and dissolution of Parliament The sovereign has the power to summon, prorogue and dissolve Parliament. Each parliamentary session begins with the sovereign's summons. The new parliamentary session is marked by the State Opening of Parliament, during which the monarch reads the speech from the throne in the chamber of the House of Lords, outlining the Government's legislative agenda. Prorogation usually occurs about one year after a session begins, and formally concludes the session. Dissolution ends a parliamentary term, and is followed by a general election for all seats in the House of Commons. If not dissolved sooner, Parliaments are automatically dissolved after five years. The Fixed-term Parliaments Act 2011 temporarily removed the sovereign's authority to dissolve Parliament, however, this power was restored by the Dissolution and Calling of Parliament Act 2022. The sovereign's power of prorogation was unaffected, which is a regular feature of the parliamentary calendar. In 1950 the King's Private Secretary Sir Alan "Tommy" Lascelles, writing pseudonymously to The Times newspaper, asserted a constitutional convention: according to the Lascelles Principles, if a minority government asked to dissolve Parliament to call an early election to strengthen its position, the monarch could refuse and would do so under three conditions. When Harold Wilson requested a dissolution late in 1974, the Queen granted his request as Heath had already failed to form a coalition. The resulting general election gave Wilson a small majority. The monarch could in theory unilaterally dismiss the prime minister, but in practice, the prime minister's term nowadays comes to an end only by electoral defeat, death, or resignation. The last monarch to remove the prime minister was William IV, who dismissed Lord Melbourne in 1834. Other royal prerogatives Before a bill passed by the legislative Houses can become law, royal assent (the monarch's approval) is required. In theory, assent can either be granted (making the bill law) or withheld (vetoing the bill), but since 1707 assent has always been granted. The sovereign has a similar relationship to the devolved governments of Scotland, Wales, and Northern Ireland as they have to the government