The Claimant in this arbitration is BG Group Plc. (BG), a British corporation located at 100 Thames Valley Park Drive, Reading Berkshire, RG6 1PT, in the United Kingdom. BG has a direct and an indirect ownership interest in MetroGAS S.A. (MetroGAS). MetroGAS is a natural gas distribution company incorporated in Argentina. BG was represented by Nigel Blackaby, Lluis Paradell, Andrea Saldarriaga, and Sylvia Noury of Freshfields Bruckhaus Deringer, and Francisco Macías of Marval, O'Farrell & Mairal.