House of Lords

===Lords Temporal===
{{main|Lords Temporal}}

====Hereditary peers====
Since the [[Dissolution of the Monasteries]], the Lords Temporal have been the most numerous group in the House of Lords. Unlike the Lords Spiritual, they may be publicly partisan, aligning themselves with one or another of the political parties that dominate the House of Commons. Publicly non-partisan Lords are called [[crossbencher]]s. Originally, the Lords Temporal included several hundred hereditary peers (that is, those whose peerages may be inherited), who ranked variously as [[duke]]s, [[marquess]]es, [[earl]]s, [[viscount]]s, and [[baron]]s (as well as Scottish [[Lords of Parliament]]). Such hereditary dignities can be created by the Crown; in modern times this is done on the advice of the Prime Minister of the day (except in the case of members of the Royal Family).

Holders of [[peerage of Scotland|Scottish]] and Irish peerages were not always permitted to sit in the Lords. When Scotland united with England to form [[Great Britain]] in 1707, it was provided that the Scottish hereditary peers would only be able to elect 16 [[List of Scottish representative peers|Scottish representative peer]]s to sit in the House of Lords; the term of a representative was to extend until the next general election. A similar provision was enacted when Ireland merged with Great Britain in 1801 to form the [[United Kingdom]]; the Irish peers were allowed to elect 28 [[List of Irish representative peers|Irish representative peer]]s, who were to retain office for life. Elections for Irish representatives ended in 1922, when most of [[Ireland]] became an independent state known as the [[Irish Free State]]; elections for Scottish representatives ended with the passage of the [[Peerage Act 1963]], under which all Scottish peers obtained seats in the Upper House.

In 1999, the Labour government brought forward the House of Lords Act removing the right of several hundred hereditary peers to sit in the House. The Act provided, as a measure intended to be temporary, that 92 people would continue to sit in the Lords by virtue of hereditary peerages, and this is still in effect.

Of the 92, two remain in the House of Lords because they hold royal offices connected with Parliament: the [[Earl Marshal#England|Earl Marshal]] and the [[Lord Great Chamberlain]]. Of the [[List of hereditary peers elected under the House of Lords Act 1999|remaining ninety peers sitting in the Lords by virtue of a hereditary peerage]], 15 are elected by the whole House and 75 are chosen by fellow hereditary peers in the House of Lords, grouped by party. (A holder of a hereditary peerage who is given a life peerage becomes a member of the House of Lords without a need for a by-election.) The exclusion of other hereditary peers removed [[Charles III|Charles, then Prince of Wales]] (who was also [[Earl of Chester]]) and all other royal peers, including [[Prince Philip, Duke of Edinburgh]]; [[Prince Andrew, Duke of York]]; [[Prince Edward, Duke of Edinburgh|Prince Edward, then Earl of Wessex]]; [[Prince Richard, Duke of Gloucester]]; and [[Prince Edward, Duke of Kent]].

The number of hereditary peers to be chosen by a political group reflects the proportion of hereditary peers that belonged to that group (see [[#Current composition|current composition]] below) in 1999. When an elected hereditary peer dies, a [[By-elections to the House of Lords|by-election]] is held, with a variant of the [[Instant-runoff voting|Alternative Vote]] system being used. If the recently deceased hereditary peer had been elected by the whole House, then so are their replacement; a hereditary peer elected by a specific political group (including the non-aligned crossbenchers) is replaced by a vote of the hereditary peers already elected to the Lords belonging to that political group (whether elected by that group or by the whole house).

====Lords of Appeal in Ordinary====
Until 2009, the Lords Temporal also included the [[Lords of Appeal in Ordinary]], more commonly known as Law Lords, a group of individuals appointed to the House of Lords so that they could exercise its judicial functions. Lords of Appeal in Ordinary were first appointed under the Appellate Jurisdiction Act 1876. They were selected by the Prime Minister of the day, but were formally appointed by the Sovereign. A Lord of Appeal in Ordinary had to retire at the age of 70, or, if his term was extended by the government, at the age of 75; after reaching such an age, the Law Lord could not hear any further cases in the House of Lords.

The number of Lords of Appeal in Ordinary (excluding those who were no longer able to hear cases because of age restrictions) was limited to twelve, but could be changed by [[statutory instrument]]. By a convention of the House, Lords of Appeal in Ordinary did not take part in debates on new legislation, so as to maintain judicial independence. Lords of Appeal in Ordinary held their seats in the House of Lords for life, remaining as members even after reaching the judicial retirement age of 70 or 75. Former Lord Chancellors and holders of other high judicial office could also sit as Law Lords under the Appellate Jurisdiction Act, although in practice this right was only rarely exercised.

Under the Constitutional Reform Act 2005, the Lords of Appeal in Ordinary when the Act came into effect in 2009 became judges of the new Supreme Court of the United Kingdom and were then barred from sitting or voting in the House of Lords until they had retired as judges. One of the main justifications for the new Supreme Court was to establish a separation of powers between the judiciary and the legislature. It is therefore unlikely that future appointees to the Supreme Court of the United Kingdom will be made Lords of Appeal in Ordinary.<ref>{{cite web |title=UK Supreme Court |url=https://www.judiciary.uk/about-the-judiciary/our-justice-system/the-supreme-court/ |access-date=17 October 2022 |website=Courts and Tribunals Judiciary }}</ref>

====Life peers====
The largest group of Lords Temporal, and indeed of the whole House, are life peers. {{As of|2024|03|post=,}} there are 670 life peers eligible to vote in the House.<ref name="parliament.uk"/> Life peers rank only as barons or baronesses, and are created under the Life Peerages Act 1958. Like all other peers, life peers are created by the Sovereign, who acts on the advice of the Prime Minister or the [[House of Lords Appointments Commission]]. By convention, however, the Prime Minister allows leaders of other parties to nominate some life peers, so as to maintain a political balance in the House of Lords. Moreover, some non-party life peers (the number being determined by the Prime Minister) are nominated by the independent House of Lords Appointments Commission.

In 2000 the government announced that it would set up an Independent Appointments Commission, under [[Dennis Stevenson, Baron Stevenson of Coddenham|Dennis Stevenson, Lord Stevenson of Coddenham]], to select fifteen so-called "[[people's peer]]s" for life peerages. However, when the choices were announced in April 2001, from a list of 3,000 applicants, the choices were treated with criticism in the media, as all were distinguished in their field, and none were "ordinary people" as some had originally hoped.<ref>{{cite news|url=http://news.bbc.co.uk/hi/english/static/in_depth/uk_politics/2001/open_politics/lords/peoples_peers.stm |title=People's Peers: the strange case of the missing lollipop ladies |publisher=Open University |via=BBC News |year=2001<!--nothing more precise available unfortunately-->}}</ref>