Case C-279/12: Judgment of the Court (Grand Chamber) of 19 December 2013 (request for a preliminary ruling from the Upper Tribunal — United Kingdom) — Fish Legal, Emily Shirley v Information Commissioner, United Utilities Water plc, Yorkshire Water Services Ltd, Southern Water Services Ltd (Reference for a preliminary ruling — Aarhus Convention — Directive 2003/4/EC — Public access to environmental information — Scope — Concept of ‘public authority’ — Water and sewerage undertakers — Privatisation of the water industry in England and Wales)