The book presents in a distilled format the relevant principles of law, and their application in this area and provides a guide to relevant international instruments and the way(s) in which these instruments have been referred to or used in English courts. While the emphasis is on stating the law as it is, the author, a leading Silk in the field, also identifies the principles which are likely to guide practitioners in an otherwise unstructured area, supported by specific examples which will provide a subject guide to relevant instruments and sources and how they can be used.