The House had to consider whether the arbitrator had acted in excess of his powers under s38, saying the arbitrator had misconstrued the contract. The arbitrator had made his award in different currencies. Held: The question remained whether the arbitrator had exceeded its powers, not whether they had been wrongly exercised. An error of law … Continue reading Lesotho Highlands Development Authority v Impregilo Spa and others: HL 30 Jun 2005