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Hannah Ambrose

Hannah Ambrose

Senior Associate

Hannah is a Senior Associate in the international arbitration group at Herbert Smith Freehills.



Hannah works with clients and colleagues globally on complex issues relating to arbitration, dispute resolution, enforcement of awards and judgments, and public international law. 

She has represented clients in ad hoc commercial arbitrations and proceedings under the auspices of major arbitral institutions. She has advised on a number of investment treaty arbitration matters and issues, including advising clients on investment structuring and on pursuing investment treaty claims. She also has experience in advising on a range of other matters of public international law, including state immunity and immunity of international organisations. 

Hannah is listed in Legal 500 as a Rising Star for International Arbitration.

She regularly speaks and publishes on arbitration and public international law related issues and developments and is a co-author of chapters on Arbitration, ADR and Enforcement of Foreign Judgments in Blackstone's Civil Practice (pub. OUP). 

Hannah has been involved in the firm's Brexit-related work, advising clients on the impact of Brexit on dispute resolution, enforcement and choice of governing law.  

Hannah's experience includes advising:

  • Vedanta Resources PLC on a claim against India under the UK-India Bilateral Investment Treaty arising from the imposition of retroactive tax 
  • a pharmaceutical company in an ICC arbitration in connection with the termination of a supply and distribution agreement in the Middle East
  • a number of utility companies and infrastructure funds on investor-State arbitration and investment structuring in a scenario of future nationalisation, including questions as to availability and scope of treaty protections and related quantum issues.  
  • a west African state on an investment treaty claim threatened against it
  • a US investment bank on the merits of a third party's claim in an arbitration under the DIFC-LCIA Rules for the purposes of the bank's decision on whether to provide funding for the claim. 
  • a European investment bank on the impact of Brexit on dispute resolution choices in the context of novation of part of its business. 
  • an oil and gas company on application of the EU Blocking Regulation in the context of the re-imposition of sanctions against Iran by the US. 
  • on the arbitration and enforcement aspects of the settlement of a dispute between a client and a former partner. 
  • a global investment bank on its global know-how and policies on arbitration, jurisdiction, and service of process
  • a global banking and financial services provider on complex dispute resolution choices and multi-party and multi-contract arbitration issues in relation to a prepayment facility
  • on issues relating to arbitration and the immunity of international organisations in connection with a gas project in West Africa








Hannah spent six years as a Professional Support Consultant advising clients and colleagues across Herbert Smith Freehills' global arbitration practice. Before joining the firm in 2012, Hannah was a Senior Associate in the international arbitration practice of another global firm.


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