AbstractAccounts of human beings as vulnerable have provided powerful reposts to liberal individualism in recent decades. Concurrently, the European Court of Human Rights’ jurisprudence on Convention states’ positive obligations often obliges public authorities to address particular vulnerabilities. These developments reflect elements of different theoretical accounts of vulnerability but lack a coherent approach to the human subject. Exploring the impact of this in the UK Supreme Court’s jurisprudence, we evaluate two case studies in which positive obligations have been imposed on the police; (1) public order in the context of inter-community tensions in Northern Ireland (DB v. Chief Constable of Police Service of Northern Ireland) and (2) police investigations in regard to serial sexual offending (Commissioner of Police of the Metropolis v. DSD). This jurisprudence illustrates how some domestic judges are supplying their decisions with rationalisations which are lacking in the European Court’s case law.