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.

Leopold Abse was a British lawyer and politician. He was a British Labour MP for nearly 30 years, noted for promoting private member's bills to decriminalise male homosexual relations and liberalise the divorce laws. During his parliamentary career, Abse introduced more private member's bills than any other parliamentarian in the 20th century. After his retirement from Parliament he wrote several books about politics, based on his interest in psychoanalysis.