This collection of essays is the product of a conference held at the University of Birmingham in 1998, and it contains contributions from scholars in the fields of both public and private law. The meaning of proportionality is examined in a number of different contexts, including those of EC law, the domestic law of the Member States of the EU and the law of the European Convention on Human Rights. Its substantive content and procedural implications are analyzed and contrasted, in particular with the concept of ""Wednesbury unreasonableness"". Its use in criminal and anti-discrimination law is also examined, as is its future impact in the UK after incorporation of the European Convention.