As at this date, membership of the House included:
- Four former First Secretaries of State
- Two former deputy Prime Ministers
- Three former Chancellors of the Exchequer
- Five former Home Secretaries
- Four former Foreign Secretaries
- Eight former UK political party leaders
- 186 former Members of the House of Commons (MPs)
- 25 former Members of the European Parliament (MEPs)
- Nine former or current Members of the Scottish Parliament (MSPs)
- Six former or current Members of the National Assembly for Wales (AMs)
- Seven former or current Members of the Northern Ireland Assembly (MLAs)
- Six former or current Members of the London Assembly
- Five former Cabinet Secretaries
- Six former Heads of the Home Civil Service
- Three former Heads of the Diplomatic Service
- Two former Director-Generals of the Security Service (MI5)
- Seven former Chiefs of the Defence Staff
- Eleven former or current Justices of the Supreme Court
- Eight former European Commissioners
- Two former Secretary-Generals of NATO
This briefing updates the House of Lords Library Note House of Lords: Profile of Membership (2 June 2015), which provided background information on the membership and age profile of the House of Lords, together with information on the public positions held by Members, as the House was composed on 30 March 2015—the date on which the 2010–15 Parliament was dissolved.