The UK's Civil Partnership Act 2004 and the Marriage (Same-Sex) Act 2014 are important legal, social and historical landmarks. Same-sex relationship recognition has become a key site of political contestation rich in symbolic, material and cultural meanings. While fiercely opposed by many, within mainstream narratives they are often represented as a victory in a legal reform process that commenced with the decriminalisation of homosexuality. This collection brings together leading scholars and commentators from a wide range of professions and disciplinary backgrounds to critically reflect on the first ten years of the Civil Partnership Act and the introduction of same-sex marriage.