All-Party Groups (APGs) within United Kingdom politics are informal, cross-party, interest groups of the UK Parliament. APGs have at least 20 members who are all Members of the House of Commons and House of Lords. The All-Party Parliamentary Humanist Group (APPHG) is a subject group of the APG whose purpose is to bring together non-religious humanist, atheist and agnostic MPs and peers to discuss matters of shared interest.