List of hereditary peers of the House of Lords since 1999

This is a list of hereditary peers of the House of Lords since the reforms of the House of Lords Act 1999. The Act excluded all hereditary peers who were not also life peers except for two holders of royal offices plus 90 other peers, to be chosen by the House. The initial cohort were elected in the 1999 House of Lords elections. Between 1999 and November 2002 vacancies among this group were filled by runners-up in the 1999 election. Since then by-elections to the House of Lords have filled vacancies.

For both the 1999 elections and by-elections candidature is restricted to peers in the Peerages of England, Scotland, Great Britain and the United Kingdom. Peers in the Peerage of Ireland are only eligible if they hold a title in one of the other peerages, but if elected, they may use their Irish peerage whilst in the Lords. Electorates are either the whole House or a party group of sitting hededitary peers within. A Standing Order of the House, approved prior to enactment of the Act, mandates that the remaining elected hereditary peers consist of:


 * 2 peers elected by the Labour hereditary peers
 * 42 peers elected by the Conservative hereditary peers
 * 3 peers elected by the Liberal Democrat hereditary peers
 * 28 peers elected by the Crossbencher hereditary peers
 * 15 peers elected by the whole House
 * By convention, whole-House elections elect members of the same affiliation as the departed peer
 * The holders of the offices of Earl Marshal and Lord Great Chamberlain as ex officio members

These numbers elected by each group reflected the relative strengths of the parties among hereditary peers at the time of the Act. This allocation has remained unchanged since 1999.

The fifteen peers elected by the whole house were intended to provide a group of experienced members ready to serve as Deputy Speakers or other officers.

Earl Marshal
The Earl Marshal is an hereditary post held by the Duke of Norfolk.

Lord Great Chamberlain
The Lord Great Chamberlain is a hereditary office in gross post among the Cholmondeley, Heathcote-Drummond-Willoughby and Carington families.

In 1902 it was ruled by the House of Lords that the then joint office holders (the 1st Earl of Ancaster, the 4th Marquess of Cholmondeley, and the Earl Carrington, later Marquess of Lincolnshire) had to agree on a deputy to exercise the office, subject to the approval of the Sovereign. Should there be no such agreement, the Sovereign should appoint a deputy until an agreement be reached.

In 1912 an agreement was reached. The office, or right to appoint the person to exercise the office, would thereafter rotate among the three joint office holders and their heirs after them, changing at the start of each successive reign. Cholmondeley and his heirs would serve in every other reign; Ancaster and Carrington would each serve once in four reigns.

Resigned
Pursuant to section 1 of House of Lords Reform Act 2014

Resigned Conservative peers
Pursuant to section 1 of House of Lords Reform Act 2014

Removed Conservative peers
Pursuant to section 2 of House of Lords Reform Act 2014

Resigned Crossbench peers
Pursuant to section 1 of House of Lords Reform Act 2014

Removed Crossbench peers
Pursuant to section 2 of House of Lords Reform Act 2014

Current party composition
, the party affiliations of the elected hereditary peers are as follows:


 * One additional hereditary peer is an ex officio member of the Lords: Duke of Norfolk (Earl Marshal).