'Questions concerning the role of international law before national courts are confronting the courts with constitutional problems as profound as any that have arisen during the past 200 years. This masterly study, by an eminent practitioner and academic, offers both an incisive analysis of the problems and a subtle and precise approach to a solution based upon the methodologies of private international law. It is an outstanding study, carrying the torch of Hersch Lauterpacht and Francis Mann into a new century and a very different world.' Vaughan Lowe, QC, Emeritus Chichele Professor of Public International Law, University of Oxford