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Guglielmo Verdirame

PhD (London School of Economics); MA (Oxon); LLM (London); Laurea (Bologna)

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Guglielmo Verdirame’s practice covers all aspects of public international law and international arbitration. He is recognised as one of the leading practitioners in the field by the main legal directories.

Guglielmo acts as counsel in cases before English courts, international courts (including the International Court of Justice and the International Tribunal for the Law for the Law of the Sea); and arbitral tribunals (ICSID, ICSID-Additional Facility, PCA, UNCITRAL, ICC, SCC, LCIA, Court of Arbitration for Sport). He is also instructed in an advisory capacity. His clients include governments, companies, international organisations, non-governmental organisations and individuals. As a member of the UK Attorney General Public International Law Panel of Counsel, he is regularly instructed to act for the UK Government in both domestic and international cases.

His cases have involved legal issues across the full breadth of public international law: treaty interpretation; immunities and privileges (e.g. State Immunity Act, the Vienna Convention on Diplomatic Relations, the Conventions on Privileges and Immunities of the UN and Specialised Agencies); investment (both BITs and ECT); trade (WTO, both GATT and GATS); human rights (e.g. HRA, ECHR, EU Charter on Fundamental Rights, ICCPR, Inter-American Convention on HR, OECD Guidelines for Multinational Enterprises); law of armed conflict and national security; UN Convention on the Law of the Sea Law of the Sea; and boundary disputes between States. In his international arbitration practice, Guglielmo has dealt with a wide range of questions including in relation to contract interpretation and applicable law, treaty/contract relationship, enforcement of awards, procedural and evidential matters, and legal/evidential issues around damages assessment.

Guglielmo is Professor of International Law at King's College London. He has published extensively in the areas of public international law, international arbitration, and comparative public law.

Guglielmo was appointed to the UK Attorney General’s Specialist Public International Law A  Panel of Junior Counsel in 2017.




  • Public International Law
  • International Arbitration

Principal Cases: 

International Litigation

Obligations concerning Negotiations relating to Cessation of the Nuclear Arms Race and to Nuclear Disarmament (Marshall Islands v United Kingdom) International Court of Justice – Counsel to the United Kingdom

The "Enrica Lexie" Incident (Italy v. India), Provisional Measures, International Tribunal of the Law of Sea – Counsel for the Italian Republic

Exxon Mobil v. Russian Federation and Sakhalin Oblast, UNCITRAL/Stockholm – Counsel for the Russian Federation 

Türkiye Petrolleri Anonim Ortakligi v Republic of Kazakhstan (ICSID Case No. ARB/11/2) [Turkey-Kazakhstan BIT and Energy Charter Treaty] – Counsel to the Republic of Kazakhstan

Foresti and De Carli v Republic of South Africa, ICSID/ARB/07/01 [Italy-South Africa BIT and Belgium-South Africa BIT] – Counsel to the Claimants

Kardassopoulos and Fuchs v Republic of Georgia, ICSID Case Nos. ARB/05/18 and ARB/07/15 [Georgia-Greece BIT, Georgia-Israel BIT, and Energy Charter Treaty] – Adviser to the Claimants

Case of J. v Peru. Preliminary objection, merits, reparations and costs. Judgment of November 27, 2013. Series C No. 275, Inter-American Court of Human Rights – Counsel to the Claimant

Adrian Mutu v Chelsea FC (Court of Arbitration for Sports 2008/A/1644) – Counsel to the Claimant

Thai-Lao Lignite Co. Ltd and Hongsa Lignite Co. Ltd v Government of the Lao People’s Democratic Republic, Civil Appeal No. W-02 (NCC)(A)-96-01/2013, Court of Appeal of Malaysia – Adviser to the Respondent State

English Courts

Freedom and Justice Party and others v. Foreign and Commonwealth Office and Director of Public Prosecutions, [2016] EWHC 2010 (Admin) – Counsel for the Foreign and Commonwealth Office

Al-Juffali v. Estrada, [2016] EWCA Civ 176 – Counsel for the Foreign and Commonwealth Office

FF v Director of Public Prosecution, CO/11360/2012, High Court of Justice – Counsel to the UK Director of Public Prosecutions (immunity)

KL v R, [2014] EWCA Crim 1729 (Court of Appeal) – Amicus Curiae (appointed by the Attorney General)

Republic of Italy et al. v Sotheby’s, Claim No. HQ09X00180 (High Court of Justice) – Counsel to the Republic of Italy

R (Al Rawi and others) v Secretary of State for Foreign and Commonwealth Affairs and Secretary of State for the Home Department (United Nations High Commissioner for Refugees intervening) [2006] EWCA Civ 1279) – Counsel to the Claimant

Non-contentious matters (details omitted where required by confidentiality)

Counsel to the UK FCO on a complex international matter (details confidential)

Expert Opinion for the global security company G4S on issues of international human rights/corporate social responsibility in relation to its business activities in Israel and the Occupied Palestinian Territories

Advice to an African State on boundary issues States (matter is confidential and currently under mediation)

Advice to the Republic of Honduras and NYU’s Urbanisation Project on the Establishment of Charter Cities and issues of national sovereignty/territorial integrity

Advice for an Asian State on potential proceedings in the International Court of Justice under a human rights treaty (proceedings were not commenced)

Advice to the Republic of Turkey on certain pieces of EU legislation

Advice on litigation strategy in connection to restitution claims brought under Article 1, Protocol I of the ECHR

Advice to investors on potential arbitration proceedings under various Bilateral Investment Treaties and the Energy Charter Treaty

UN sanctions on Iran (for a bank)

Sanctions on Zimbabwe (for a bank)

Re-structuring of assets/investments worth in excess of $1bn with a view to maximising international legal protection (for a high-net worth Asian businessman)

Compliance with the laws of war in an internal armed conflict (for a non-state actor)

Arbitral Appointments

International Chamber of Commerce (ICC) – Case No. EXP/410/ICANN/27

International Chamber of Commerce (ICC) – Case No. EXP/414/ICANN/31

International Chamber of Commerce (ICC) – Case No. EXP/415/ICANN/32

London Court of International Arbitration –Arbitration No. UN122272 (commercial dispute - case settled)

Education and Career: 

Guglielmo is Professor of International Law at King’s College London.

Previous appointments include:

-Visiting Professor at Columbia Law School (2015)
-Lecturer in the Faculty of Law and a Fellow of the Lauterpacht Centre for International Law at the University of Cambridge (2003-2011)
-Visiting Professorial Fellow, Harvard Law School (2007)
-Junior Research Fellow, Merton College, University of Oxford (2000-2003).

He holds the following degrees: PhD (LSE), MA (Oxon: Hon), MA (Cantab: Hon), LLM (London), Laurea in Giurisprudenza (Bologna).



See Full CV below.

Appointments and Society Memberships: 

  • American Society of International Law, British Institute of International and Comparative Law, International Law Association, European Society of International Law
  • The UK Attorney General’s Specialist Public International Law A Panel of Junior Counsel.







"His work is top class" and "he's very hands-on and responsive in a way that a lot of academics aren't." (Chambers & Partners, UK Bar 2016)

"Bright, able, and clearly knows his stuff." (The Legal 500 2016)

"Extremely strong, he's very much sought after by certain very senior silks and that's a testament to how good he is. He is a true future star." (Chambers & Partners, UK Bar 2015)

"Guglielmo Verdirame has a lot of experience as an advocate and a stalwart academic background as a professor of international law at King's College London. He 'always looks for solutions that may not be obvious in order to advance his clients' cases'." (Chambers & Partners, Global, 2014)

"He's really on the ball for investment treaty disputes." (Chambers & Partners, UK Bar, 2014)

"Very astute, he has been a real asset to our team." (Chambers & Partners, UK Bar, 2014)

"a rising star". (The Legal 500, UK Bar, 2013)

"Guglielmo Verdirame "lives and breathes this area" and is applauded for his "excellence in terms of both pure, traditional PIL and investor-state arbitration"." (Chambers & Partners, UK Bar, 2013)

"... the ‘very user-friendly and unflappable' Guglielmo Verdirame is ‘a rising star in the field of international law'." (Legal 500, 2012)