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Naomi Briercliffe



Naomi Briercliffe



Naomi represents clients in international commercial and investor-state arbitrations, and has also advised on state-to-state disputes, including before the International Court of Justice and Iran-U.S. Claims Tribunal. Naomi has experience of institutional and ad hoc arbitration proceedings, including arbitrations under the ICC, LCIA, SCC, ICSID and UNCITRAL Rules. She has appeared as counsel and advocate in commercial, investor-state and state-to-state cases.

Naomi acts for a broad spectrum of clients from across the globe, but has particular experience of disputes relating to the energy, telecoms and infrastructure sectors, and arising in Europe, the Middle East and Africa.

In addition to her disputes work, Naomi provides advice on public international law matters, front-end risk management options for international investments and the enforcement of awards and judgments.

Naomi is recommended by Who’s Who Arbitration (2018 and 2019), Chambers (2019) and Legal 500 (2018 and 2019). The directories describe her as “a rising star and future leader”, with “remarkable expertise in public international law” (Who’s Who Arbitration 2019). They also note her “high intellectual rigour and excellent client management skills” (Legal 500, 2019) and ability to “synthesise vast amounts of information and focus on important points, with great attention to detail and interpersonal skills” (Chambers 2019).


News & insights

A coal power plant in Vietnam

Publications: 21 OCTOBER 2021

Indonesia passes carbon tax bill as part of GHG regulation effort

There are two important legislative developments in Indonesia as the country attempts to meet its obligations under the Paris Agreement. Indonesia’s House of Representatives (Dewan Perwakilan Rakyat…

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System of pipes

Publications: 19 OCTOBER 2021

Carbon transport and storage in the UK

Today the UK Government has announced which two carbon transport and storage clusters have been successful in the initial phase of the UK Government's carbon capture, usage and storage cluster…

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Publications: 12 OCTOBER 2021

Hong Kong's personal data law given new teeth - what they mean for businesses

The Personal Data (Privacy) (Amendment) Ordinance 2021 (the Ordinance) came into effect on 8 October 2021.

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Person handling documents

Publications: 12 JANUARY 2021

Brexit certainty at last? An overview of the new EU-UK trading relationship

Following months of protracted negotiations and coming four and a half years after the UK voted to leave the EU, 24 December 2020 saw the EU and UK finally agree the shape of their future…

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Allen & Overy LLP
One Bishops Square
E1 6AD

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Registered Foreign Attorney, New York, 2018

Solicitor Advocate, England and Wales, 2015

Solicitor of the Senior Courts of England and Wales, 2011


Legal Practice Course, 2008 (College of Law, London)

LLB (hons), 2008 (College of Law, London)

MA (cantab), 2006 (King’s College, Cambridge University)

Pro-bono experience

Assisted the African Union with the development of a guidebook concerning the mechanisms available for the resolution of boundary disputes Member of the Arms Trade Treaty Response Network Advised a grass-roots UK-based charity on its constitution and governance issues

Published work

Book chapter (co-authored), ICSID Convention Article 52(1)(e), in Alvarez, Gerbay and Fouret ed., ICSID Practical Commentary (forthcoming, 2019)

Article (co-authored), Human-rights-based-claims by States and new generation investment agreements, Kluwer Arbitration Blog, August 2018

Article (co-authored), Could Tanzania face new investment claims?, Africa Law and Business, July 2017

Article, Holding investors to account for human rights violations through counterclaims in investment treaty arbitration, Practical Law, January 2017

Article (co-authored), Challenges to treaty award on jurisdiction in the national courts: what is the appropriate standard of review?, Practical Law, November 2016

Guidebook (co-editor and contributing author), A Guidebook for Decision-Makers: Mechanisms for Resolving Boundary Disputes in Africa, African Union, July 2016

Article, Update on Gender Diversity in Arbitration, IBA Newsletter, July 2016

Article (co-authored), Enforcing contracts in emerging markets, Africa Law and Business, May 2016

ICJ Rules in Hindu Temple Dispute, Global Arbitration Review, 2013