Judgment of the Court of 7 November 2000 in Case C-371/98 (reference for a preliminary ruling from the Queen's Bench Division (Divisional Court) of the High Court of Justice of England and Wales): The Queen v Secretary of State for the Environment, Transport and the Regions (Directive 92/43/EEC — Conservation of natural habitats and of wild fauna and flora — Definition of the boundaries of sites eligible for designation as special areas of conservation — Discretion of the Member States — Economic and social considerations — Severn Estuary)