Dr Philippa Webb’s practice covers all aspects of public international law, and reflects her expertise in the law of State immunity. She acts for States and private entities in domestic and international courts on a wide range of issues including State and diplomatic immunities, territorial and maritime boundaries, treaty obligations, law of the sea, State responsibility, human rights, humanitarian law, law of international organisations, and international criminal law.
Philippa has particular expertise in the law of state immunity and advises governments, organisations, corporations and individuals on all aspects of immunity, including immunity from enforcement, diplomatic status, and related concepts such as act of state and non-justiciability. She is the co-author, with Lady Hazel Fox QC, of the leading treatise The Law of State Immunity. Her work has been cited by the UK Supreme Court, the Court of Appeal of England and Wales, the Supreme Court of Canada and the Supreme Court of Appeal of South Africa.
Philippa was appointed to the UK Attorney General’s Specialist Public International Law C Panel of Junior Counsel in 2017.
Philippa is a specialist regarding the International Court of Justice, having served as the Legal Officer and Special Assistant to Judge Rosalyn Higgins DBE QC during her presidency (2006-2009). She also worked as legal adviser at the International Criminal Court, at United Nations Headquarters, and at an international law firm in Sydney and Tokyo.
Philippa is currently counsel in two disputes pending before the ICJ concerning maritime boundary delimitation, treaty interpretation, and immunities from jurisdiction and enforcement. She is counsel before an arbitral tribunal constituted under Annex VII of the United Nations Convention on the Law of the Sea for the Italian Republic in its dispute with India over the "Enrica Lexie" incident. She has been counsel in cases before the European Court of Human Rights and the International Tribunal for the Law of the Sea.
Philippa is presently instructed in a number of cases before the English courts involving matters of public international law.
Philippa was admitted to the New York Bar in 2006, and called to the Bar of England and Wales in 2016. She has a doctorate and masters in international law from Yale Law School and degrees in Law and Asian Studies from the University of New South Wales, Australia (where she received the University Medal for both degrees).
Philippa is Reader (Associate Professor) at King’s College London. She speaks French and Japanese.