All books in this flagship series contain carefully selected substantial extracts from key cases, legislation, and academic debate, providing able students with a stand-alone resource. This chapter explores three defences to negligence which are also defences to other torts: volenti non fit injuria or willing assumption of risk, the illegality defence (also known as ex turpi causa), and contributory negligence. In relation to contributory negligence, the chapter considers responsibility, which involves questions both of causal influence and of fault, before turning to a discussion of apportionment of responsibility between the parties, and proportionality. In relation to illegality, recent decisions of the Supreme Court are examined.Relevant provisions of the Law Reform (Contributory Negligence) Act 1945 are extracted, together with further extracts from significant cases.