Courtney is developing a broad practice across all of Chambers’ practice areas, including commercial litigation, international arbitration and public international law.
Courtney is a member of the Attorney General’s ‘Junior Juniors’ panel scheme and she regularly advises the Foreign, Commonwealth & Development Office on a range of commercial and international law issues. Courtney also has an expertise in INTERPOL. She is the co-author of the leading text on INTERPOL, The Legal Foundations of INTERPOL (2nd edn, 2020), has advised States on INTERPOL matters, and is well-versed in challenging INTERPOL red notices.
Before joining Twenty Essex, Courtney qualified as a solicitor-advocate. She worked at a leading Wall Street firm, where she specialised in financial regulation. In 2020, Courtney was seconded to the Foreign, Commonwealth & Development Office’s Legal Directorate, where she advised on urgent issues arising in the context of Brexit and the COVID-19 pandemic.
Courtney also served as a Judicial Assistant to Lord Hodge and Lord Lloyd-Jones at the Supreme Court of the United Kingdom. During this time, Courtney worked on cases in a wide range of areas, including Vedanta v Lungowe  UKSC 20 (jurisdiction in the context of a parent company’s liability for a subsidiary’s torts), Sevilleja v Marex  UKSC 31 (reflective loss rule in company law), and Elgizouli  UKSC 10 (mutual legal assistance and data protection).