Ian Park

Professional practice

Prior to joining Essex Court Chambers Ian Park was a Commodore and barrister in the Royal Navy. Ian’s 23-year career culminated in his appointment as the Head of Navy Legal and the Royal Navy’s senior barrister. An international law specialist, Ian has deployed worldwide in support of the Royal Navy’s contribution to defence including as a legal adviser on operations to Afghanistan and, on many occasions, to the Middle East. He has advised the UK Government, Nato and the UK’s allies and partners on a wide range of international law areas including International Humanitarian Law, the Law of the Sea, the Law of Naval Warfare, International Human Rights Law and International Criminal Law. Ian also has a particular interest in the law applicable to emerging technologies in conflict, most notably artificial intelligence, autonomous systems, the military uses of outer space and cyber operations.

Ian has been a Fellow at Harvard Law School and currently teaches international law part-time at Yale Law School and Cambridge University. He has written or contributed to five books including the monograph The Right to Life in Armed Conflict (Oxford University Press, 2018) and continues to collaborate on several academic international law projects, most recently on issues of artificial intelligence and autonomy in conflict, cyber law and the protection of critical national infrastructure. Ian also teaches international law to military officers and Government officials from numerous states, particularly in Asia.

Human rights & civil liberties

Ian has advised on a range of international human rights law issues principally, although not exclusively, related to armed conflict. He has advised extensively on the applicability of international human rights law to armed conflict and the relationship between international human rights law and international humanitarian law. Ian has also advised the UK government of the applicability of international human rights law to detention during armed conflict and assisted in writing UK military doctrine in this area. He has also written widely on issues of human rights law generally and for a number of years taught a course on ‘Human Rights Law and Armed Conflict’ at Edinburgh University Law School.

Public international law

Ian has advised on a wide range of public international law issues across a broad spectrum of areas including International Humanitarian Law, the Law of the Sea, the Law of Naval Warfare, and International Criminal Law. Specifically, he has advised on the use of force in armed conflict, maritime interdiction operations, counter-piracy and counter-narcotics operations, the immunity of warships and government owned and operated vessels, military detention operations, the protection of critical national infrastructure, the regulation of private military and security companies and the military contribution to law enforcement.

Within the area of new and emerging technologies, Ian has advised on issues related to cyber warfare and military cyber operations generally, the use of AI in weapon systems, autonomous weapon systems and maritime autonomous systems, military uses of outer space, mass surveillance and data gathering, and the protection of critical national infrastructure, specifically undersea fibre-optic cables.

On behalf of the UK Government, Ian has also conducted legal reviews in respect of new means and methods of warfare such that the UK can satisfy their legal obligations pursuant to Article 36 of Additional Protocol I to the Geneva Conventions.

With respect to the Law of the Sea, Ian has advised on international law issues related to rising sea levels, climate change, the melting polar ice cap, Arctic navigational routes and sovereignty, the freedom of navigation at sea, sovereignty disputes and military activities regulated by the UN Convention on the Law of the Sea.

Career

2026 Essex Court Chambers

2026 Appointed to the Attorney General’s Public International Law A Panel

2024 – 2026 Head of Navy Legal, Royal Navy

2022 – present Yale Law School, Visiting Lecturer in Law

2021 – present Edinburgh University Law School, Fellow

2019 – present Cambridge University, Visiting Lecturer

2015 – 2018 Head of International Law, Royal Navy

2013 – 2015 Head of Criminal Law and Legal Compliance, Royal Navy

2003 Call – Lincoln’s Inn

Awards

2018 Armed Forces’ Barrister of the Year – UK Employed Bar Awards