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Dr Philippa Webb

Philippa WebbContact details


Room: SW3.13







Dr Philippa Webb is Reader in Public International Law. She joined The Dickson Poon School of Law in 2012 after a decade in international legal practice. She was previously visiting Assistant Professor in the Advanced LLM Programme at Leiden University (2009-2011). She has been Visiting Professor at Université Paris X Nanterre (2013-14) and ESADE Law School (2014-15 as part of their programme at the Centre for Transnational Legal Studies). She was an Adjunct Professor of Law on Pepperdine University’s London program (2014-15).

Dr Webb holds a doctorate (JSD) and an LLM from Yale Law School. She obtained the University Medal in her LLB and the University Medal and First Class Honours in her BA (Asian Studies), both of which were awarded by the University of New South Wales in Australia.

Dr Webb has extensive experience in international courts and tribunals. She served as the Special Assistant and Legal Officer to Judge Rosalyn Higgins during her Presidency of the International Court of Justice (2006-2009) and, prior to that, as the Judicial Clerk to Judges Higgins and Owada (2004-2005). She was the Associate Legal Adviser to Prosecutor Luis Moreno-Ocampo at the International Criminal Court (2005-2006).

She is on the International Advisory Panel for the American Law Institute’s project Restatement Fourth, Foreign Relations Law of the United States. Dr Webb has served as legal advisor to the Inquiry launched by United Nations human rights rapporteur Ben Emmerson QC into the use of drones in counter-terrorism operations. She was elected as co-convenor of the International Law Section of the Society of Legal Scholars in 2014.

Dr Webb has worked at the UN Secretariat in New York and in the Sydney and Tokyo offices of an international law firm. She speaks French and Japanese. Dr Webb has served as Director of Undergraduate Studies and Director of Mooting in the School of Law. 

Research interests and PhD supervision

Dr Webb’s research interests are in public international law, including international dispute settlement, international criminal law, international humanitarian law, international human rights law, and the law of international organisations. She is also very interested in the immunities of States, their officials and international organisations. Her co-authored treatise with Lady Hazel Fox QC, The Law of State Immunity (Oxford University Press, 2013; revised and updated paperback 2015) has been cited by the English Court of Appeal and the Supreme Court of Canada.

On the 60th anniversary of the adoption of the Genocide Convention in 2008, she published, together with Hirad Abtahi, the complete travaux préparatoires. In 2012, she was the co-editor, with Professor Claus Kress, of the tenth anniversary issue of the Journal of International Criminal Justice. She is co-chair of the Journal’s Editorial Committee.  She is on the Editorial Board of the Leiden Journal of International Law.

A monograph based on her doctoral thesis, International Judicial Integration and Fragmentation, was published in 2013 by Oxford University Press. 

She is currently working on research projects related to the legal practice of the United Nations, the law of State immunity, and the right to a fair trial under international law. She is the recipient of:

  • Nuffield Foundation Grant for Research and Innovation: The Right to a Fair Trial under International Law - Comparative Perspectives 
  • KPI Policy Impact Grant: Effective Parliamentary Oversight of Human Rights.

PhD Supervision

  • Pelin Ekmen (first supervisor)
  • Tomas Hamilton (second supervisor)
  • Kirsten Roberts (second supervisor)
  • Nikolas Voulgaris (second supervisor)
  • Koldo Casla (second supervisor in collaboration with European Studies)
Selected publications

Social Science Research Network



Book chapters

  • ‘Individual Criminal Responsibility’ in Amal Alamuddin, Nidal Nabil Jurdi and David Tolbert (eds), The Special Tribunal for Lebanon: Law and Practice (OUP 2014) Chapter 6
  • ‘International Organisations: Uneasy Analogies’ in Christian Tams, Antonios Tzanakopoulos and Andreas Zimmermann (eds), Research Handbook on the Law of Treaties (Edward Elgar 2013)
  • ‘Human Rights and the Immunities of State Officials’ in Erika de Wet and Jure Vidmar (eds), Norm Conflicts and Hierarchy in Public International Law: The Place of Human Rights (OUP 2012)
  • ‘Immunities and Human Rights: Dissecting the Dialogue in National and International Courts’ in Andre Nollkaemper and Ole Fauchald (eds), The Practice of International and National Courts and the (De-)Fragmentation of International Law (Hart 2012) Chapter 11

View Dr Webb’s full list of publications.



  •  Public International Law
  •  Public Law


  •  International Mooting
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