This chapter looks at the Court’s approach towards the resolution of norm conflicts. The conflict between Article 5 (the right to liberty and security) of the European Convention on Human Rights and the provisions of international humanitarian law that permit security detention is examined in detail. The chapter considers different methods of norm conflict resolution, arguing that the European Court of Human Rights manifests a very strong aversion towards holding any law superior to Convention norms. The chapter argues that the Court’s use of harmonious interpretation in Hassan v. United Kingdom is a welcome and positive development that should be followed in future cases.