Penelope Nevill > Twenty Essex > London, England > Lawyer Profile

Twenty Essex

Work Department

  • Arbitration and mediation
  • Commercial Law
  • Constitutional, public and human rights law
  • Public international law


Penelope is a specialist in international law. Her practice focuses on disputes and transactional advice across a range of areas, including public international law, EU law, public law and human rights, commercial disputes raising questions of international and EU law and the interaction between legal systems and regimes.

She has appeared as counsel before the International Court of Justice, the European Court of Human Rights, the General Court of the EU and a United Nations Convention on the Law of the Sea (UNCLOS) Annex VII Tribunal, as well as the High Court, the Court of Appeal and the Supreme Court of England and Wales. In addition, Penelope regularly provides transactional advice to governments, the private sector and NGOs.

Penelope has extensive and varied experience in practice and academia. Her career commenced as a litigation lawyer in New Zealand with leading firm Chapman Tripp and includes time as a full-time academic at the University of Cambridge, teaching public international law, EU law and the law of armed conflict. She is currently a Visiting Lecturer at King’s College, London.

Penelope is a panellist on the Attorney General’s Specialist Public International Law Panel (B Panel) and the General Panel (B Panel).

Lawyer Rankings

London Bar > Public international law

(Leading Juniors)Ranked: Tier 1

Penelope NevillTwenty Essex ‘Very quick and astute with a broad range of knowledge across areas. Willing to engage with any question no matter how big or small and always happy to get stuck into the laborious detail. Calm and diligent.’

Offering ‘perfect service‘ and ‘great breadth and depthTwenty Essex is an ‘outstanding chambers‘ that is ‘first choice for sensitive government matters and public international law‘. The set has an extremely broad selection of silks and juniors from a wide range of backgrounds, including former Legal Advisers to the Foreign and Commonwealth Office such as Sir Michael Wood KCMG and Sir Daniel Bethlehem KC. Sudhanshu Swaroop KC and Penelope Nevill are currently representing the Foreign Commonwealth and Development Office in Duarte Agostinho v Portugal & Ors, a claim before the ECHR brought by six Portuguese children against the Portuguese government and 32 other states including the UK over their failure to meet climate change commitments. Philippa Webb  is also representing a Filipino former domestic worker in the Saudi Arabian embassy in London in Wong v Basfar, a dispute before the Supreme Court concerning diplomatic immunity to cases of human trafficking and modern slavery.

London Bar > Administrative law and human rights

(Leading Juniors)Ranked: Tier 4

Penelope NevillTwenty Essex