Elections in the United Kingdom in the context of "First-past-the-post"

The House of Lords is the upper house of the Parliament of the United Kingdom. Like the lower house, the House of Commons, it meets in the Palace of Westminster in London, England. One of the oldest extant institutions in the world, its origins lie in the early 11th century and the emergence of bicameralism in the 13th century.

In contrast to the House of Commons, membership of the Lords is not generally acquired by election. Most members are appointed for life, on either a political or non-political basis. Hereditary membership was limited in 1999 to 92 excepted hereditary peers: 90 elected through internal by-elections, plus the Earl Marshal and the Lord Great Chamberlain as members ex officio, the sole two officers to directly inherit their seats. The House of Lords also includes up to 26 archbishops and bishops of the Church of England, known as Lords Spiritual. Since 2014, membership may be voluntarily relinquished or terminated upon expulsion.

His Majesty's Government, abbreviated to HM Government or otherwise UK Government, is the central executive authority of the United Kingdom of Great Britain and Northern Ireland. The government is led by the prime minister (Keir Starmer since 5 July 2024) who selects all the other ministers. The government is currently supported by the Labour party, which has had a majority in the House of Commons since 2024. The prime minister and his most senior ministers belong to the supreme decision-making committee, known as the Cabinet.

Ministers of the Crown are responsible to the House in which they sit; they make statements in that House and take questions from members of that House. For most senior ministers this is usually the elected House of Commons rather than the House of Lords. The government is dependent on Parliament to make primary legislation, and general elections are held at least once every five years to elect a new House of Commons, unless the prime minister advises the monarch to dissolve Parliament, in which case an election may be held sooner. After an election, the monarch selects as prime minister the leader of the party most likely to command the confidence of the House of Commons, usually by possessing a majority of MPs.

The United Kingdom is a constitutional monarchy which, by legislation and convention, operates as a unitary parliamentary democracy. A hereditary monarch, currently King Charles III, serves as head of state while the prime minister of the United Kingdom, currently Sir Keir Starmer since 2024, serves as the head of the elected government.

Under the United Kingdom's parliamentary system, executive power is exercised by His Majesty's Government, whose prime minister is formally appointed by the king to act in his name. The king must appoint a member of parliament that can command the confidence of the House of Commons, usually the leader of the majority party or apparent majority party, though the king may choose to appoint an alternative if they say that they cannot expect the confidence of the House. Having taken office, the prime minister can then appoint all other ministers from parliament.

The Representation of the People Act 1918 (7 & 8 Geo. 5. c. 64) was an act of Parliament passed to reform the electoral system in Great Britain and Ireland. It is sometimes known as the Fourth Reform Act. The act extended the franchise in parliamentary elections, also known as the right to vote, to men aged over 21, whether or not they owned property, and to women aged over 30 who resided in the constituency whilst occupying land or premises with a rateable value above £5, or whose husbands did. At the same time, it extended the local government franchise to include women aged over 30 on the same terms as men. It came into effect at the 1918 general election.

As a result of the act, the male electorate was extended by 5.2 million to 12.9 million. The female electorate was 8.5 million. The act also created new electoral arrangements, including making residence in a specific constituency the basis of the right to vote and institutionalising the first-past-the-post method of election.