Philippa’s practice covers all aspects of public international law. She acts for states and private entities in domestic and international courts on a wide range of issues. These include 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.
She has particular expertise in state immunity. Philippa 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.
Philippa is a specialist in relation to the International Court of Justice (ICJ). She served as the Legal Officer and Special Assistant to Judge Rosalyn Higgins GBE QC during her presidency. Philippa has also worked as a legal adviser at the ICC.
She is Professor of Public International Law at King’s College London. Philippa is also on the editorial boards of the British Yearbook of International Law, Journal of International Criminal Justice, and Leiden Journal of International Law.
Philippa was ranked as a ‘Future Leader’ in the 2018 and 2019 arbitration list, a 2018 ‘UK Bar: Rising Star’ and a 2019 recommended arbitration junior by Who’s Who Legal.