Sarah Morreau
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Sarah Morreau

Senior Associate

Sarah specializes in international arbitration with experience as counsel and advocate in complex, multi-jurisdictional disputes.

She has represented a wide range of corporate, banking and State clients in commercial and investment treaty arbitration, particularly in Europe, South East Asia and the Middle East. Sarah has acted on numerous high profile arbitration proceedings including under the ICC, LCIA, UNCITRAL and ICSID Rules.

Sarah is recognised as a Leading Associate for International Arbitration by Legal 500. Her experience covers a wide range of sectors, including energy, finance and technology disputes. In addition to her work as counsel, she also regularly advises on public international law, sovereign immunity, commercial law, and business and human rights.

Expertise

Published Work

  • 'The Canadian Model BIT - A Step in the Right Direction for Canadian Investment in Africa?' with Rainbow Willard, Kluwer Arbitration Blog, 2015
  • 'Resolving inconsistent jurisdiction clauses and limits to Fiona Trust presumption', with Tom Whittaker, A&O Litigation Review, 2015
  • 'Mitigating risk of agent insolvency', A&O Litigation Review, 2016
  • 'Third party debt orders and letters of credit', A&O Litigation Review, 2017
  • 'Defining the seat of arbitration: when 'venue' means legal seat', A&O Litigation Review, 2019
  • ‘The governing law of an arbitration agreement and why it matters’, with James Freeman, A&O Litigation Review 2020
  • ‘Governing law of an arbitration agreement: UK Supreme Court brings clarity’ with James Freeman, A&O Litigation Review 2020
  • ‘Key Global Legal Developments in Business and Human Rights, The Business and Human Rights Review 2020
  • ‘Brexit certainty at last? An overview of the EU-UK trading relationship’, with others, A&O 2021

Recognition

Leading Associate
Legal 500, 2025

Qualifications

Admissions

Admitted as solicitor, England and Wales, 2016

Academic

Legal Practice Course, University of Law, (Distinction) 2014

M.A. (hons) University of Cambridge, Fitzwilliam College, Law, 2012, 1st class 

Disclaimer
A&O Shearman was formed on May 1, 2024 by the combination of Shearman & Sterling LLP and Allen & Overy LLP and their respective affiliates (the legacy firms). Any matters referred to above may include matters undertaken by one or more of the legacy firms rather than A&O Shearman.