Professional practice

Angeline specialises in international arbitration and public law. Her arbitration practice includes commercial and investment treaty claims. She also has substantial experience in handling commercial disputes and cases involving issues of public law, constitutional law and human rights law.

In 2018, Angeline was listed as the fifth most highly regarded arbitration practitioner at the UK bar by Who’s Who Legal UK Bar’s guide. In 2017, she was named as a ‘Star at the Bar’ by Legal Week, recognised for her “excellent judgement and leadership qualities” and not being frightened to tackle novel and difficult areas of law, or “to deal head-on with the more complicated aspects of a case”.

Prior to moving to the Bar, Angeline was Counsel and Solicitor Advocate in the International Arbitration Group of a major international law firm, spending time in the London and Hong Kong offices and on secondment to the LCIA. She has worked with counsel in a wide range of jurisdictions including India, Myanmar, Indonesia, Belize, Hong Kong, Turks & Caicos Islands, Singapore, United States, Kazakhstan, Rwanda and various European states.


What Others Say

Chambers UK 2019 (Arbitration)

“She is doing excellent work and is a great member of the arbitration community” and “Very dedicated”.

Who’s Who UK Bar (Arbitration)

“a bright and efficient advocate” regarded as “a very strong up-and-coming name” in the international arbitration field.

Legal Week 2017

“She is…not frightened to tackle novel and difficult areas of law, or “to deal head-on with the more complicated aspects of a case,” with “excellent judgment and leadership qualities”.”

Who’s Who Future Leaders 2017 (Arbitration)

Angeline Welsh is “extremely knowledgeable and engaging”, and her “wealth of experience on complex cases allows her to gain client confidence easily”.

Chambers UK 2017 (International Arbitration: General Commercial & Insurance)

“Possesses a wide international arbitration practice, covering a range of commercial claims, including those concerning investment treaties and the energy, telecommunications and construction sectors. She is especially sought after for her expertise in handling disputes arising in emerging markets and in court proceedings related to arbitrations, such as enforcement of arbitral awards and anti-suit injunctions.”

Chambers UK 2016 (International Arbitration)

“Angeline Welsh is “immensely helpful,” according to clients, due to her “ability to put herself in the client’s situation when problem solving.””

Chambers UK 2015 (Administrative & Public Law)

“Angeline Welsh is an associate with growing expertise in the overlap between international arbitration and domestic public law. She has advised on judicial reviews in the Supreme Court and the Privy Council. Sources laud her as “a bit of a star. She’s a very good litigator with inexhaustible energy”.

Arbitration & related court applications

Angeline has acted as counsel (led and unled) in a range of complex arbitrations under a range of arbitral rules and has been instructed in commercial court cases. Her practice includes commercial arbitration across a range of sectors (including construction, energy, financial and telecoms disputes). She has particular expertise in emerging market jurisdictions and in handling commercial disputes against states.

Relevant cases include:

Commercial Arbitration

  • acting in the Belize courts on injunction and constitutional proceedings relating to the State’s attempts to prevent execution steps being taken in respect of arbitral awards enforced in the United States
  • acting for British Caribbean Bank Limited on its successful claim against the Government of Belize under the UK Belize Bilateral Investment Treaty (PCA Case No 2010-18), including acting on related constitutional court proceedings and injunction proceedings
  • acting for Dunkeld International Investment Limited in relation to a claim against the Government of Belize under the UK-Belize Bilateral Investment Treaty (PCA Case Nos 2010-13 and 2010-21) including acting on related injunction proceedings
  • acting for Dunkeld International Investment Limited in relation to a claim against the Government of Belize for expropriate of the right to arbitrate following the enactment of legislation criminalizing the pursuit of arbitration proceedings
  • acting on AES Corporation and Tau Power B.V. v Kazakhstan (ICSID Case No. ARB/10/16)
  • acting for an oil and gas company on a large, complex dispute relating to a construction project in the Caspian Sea conducted on an expedited basis under the LCIA Rules
  • acting for BG Group and Reliance Industries in an UNCITRAL arbitration claim against the Union of India in relation to oil fields in the Mumbai basin
  • acting for an investment bank in a successful UNCITRAL arbitration claim against a real estate development company in India, and assisting with enforcement proceedings in the US and England and Wales
  • acting for an investment bank defending a tax warranty claim under the HKIAC arbitration rules
  • acting for an oil and gas company in arbitration under the UNCITRAL Rules in a dispute against a provider of seismic survey work for breach of contract claim in Algeria
  • acting for a satellite construction company in a successful LCIA arbitration in a dispute concerning an alleged anomaly in the satellite worth around U.S. $17 million
  • representing a large corporate in an ICC arbitration concerning a dispute arising out of termination of an exclusive contract with a logistics provider for the European Region
  • acting for a bank in an LCIA arbitration concerning allegations relating to the validity of a loan note, specifically the capacity of the borrower to enter into the loan note
  • acting for telecommunications company in an LCIA arbitration against a state relating to a concession agreement raising issues related the legality of the taxation and regulatory regime
  • acting for a bank and its holding company in an LCIA arbitration relating to a settlement agreement with a state entity, in particular concerning the legality of certain tax treatment
  • advising on the dispute resolution options for foreign investors in Myanmar
  • advising on insurance related dispute under the Swiss Rules of International Arbitration
  • advising on dispute relating to closing accounts under the Swiss Rules of International Arbitration
  • advising Asian clients on potential investment treaty claims, including under the ASEAN Comprehensive Investment Agreement, involving countries such as Indonesia and Myanmar Arbitration related court experience Angeline has particular expertise in handling applications related to arbitration. She has advised on a range of court applications related to arbitration, including anti-suit injunctions, interim relief in support of arbitration and enforcement of arbitral awards. Relevant cases include:
  • acting as counsel for AES Ust-Kamenogorsk Hydropower Plant LLP against Ust-Kamenogorsk Hydropower Plant JSC in securing and defending an anti-arbitration injunction from the English Court obtained against a Kazakhstan state entity ([2013] UKSC 35)
  • advising on the first appeal before The Caribbean Court of Justice to consider the objections of arbitrability and public policy to the enforcement of an arbitral award (CCJ Appeal No. CV7 of 2012)
  • acting for the ICC in its intervention in the high profile English Supreme Court in Jivraj v Hashwani ([2011] UKSC 40) (concerning whether an arbitration agreement which specified that arbitrators must be of a particular religious faith was contrary to discrimination legislation and therefore unlawful, a case which had broader implications for the validity of arbitration clauses which commonly include nationality reuirements.)
  • advising on a challenge to an arbitral award in the Delhi High Court (Union of India v Reliance Industries Ltd & Anor OMP 46 of 2012)
  • regularly advising on applying for and defending anti-suit injunctions, anti-arbitration injunctions, and applications for recognition and enforcement.
Public & administrative law

Angeline has acted on a broad range of public law matters, before the English courts and the Caribbean and the ECtHR, including:

  • advising (with Jessica Simor QC) Open Society Foundation on the question of whether the Hungarian NGO Funding Law is in breach of EU Fundamental Freedoms and Charter Rights
  • acting for Ahmet and Mehmet Altan in their applications to the European Court of Human Rights relating to their detention in Turkey
  • acting for Human Rights Watch as intervener in Big Brother Watch & Others v United Kingdom (ECtHR Application No: 58170/13)
  • acting as junior counsel for FortisTCI Limited on its successful appeal to the Privy Council relating to license requirements for ISM devices (FortisTCI Limited v Islandcom Telecommunications Limited [2014] UKPC 33)
  • acting for British Caribbean Bank in a series of constitutional challenges in the Belize courts to legislation, including constitutional amendments, expropriating the bank’s loan and security interests in connection with the nationalisation of the main telecoms company in Belize – Belize Telemedia Limited
  • acting for individuals in successful constitutional challenge before the Caribbean Court of Justice to legislation imposing severe penalties (imprisonment and large fine) for acting in breach of court orders injuncting arbitration proceedings (CV 8 of 2012)
  • acting for Bail for Immigration Detainees as intervener in Shepherd Masimba Kambadzi (previously referred to as SK (Zimbabwe)) (FC) v Secretary of State for the Home Department [2011] UKSC 23
  • acting for Bail for Immigration Detainees as Intervener in R. (on the application of K) v Secretary of State for the Home Department [2009] EWCA Civ 219
  • R. (on the application of Countryside Alliance) v Attorney General [2005] EWHC 1677 (Admin)
  • R. (on the application of Jackson) v Attorney General [2005] UKHL 56
Public international law

Angeline has acted as counsel in investment treaty claims and regularly advises on the structuring of investments in order to gain investment treaty protection. She led the team advising on three investment treaty claims against the Government of Belize arising out of the nationalisation of Belize Telemedia Limited which successfully settled.


Matrix Chambers, Barrister, 2015 to 2020

Allen & Overy LLP, Trainee, Associate, Senior Associate, Counsel 2003 to 2015

  • Legal Week, “Star at the Bar”, 2017
  • Advised on the 2016 Myanmar Arbitration Act that led to Myanmar being awarded the 2016 GAR Award for jurisdiction that has made great progress
  • AES Ust-Kamenogorsk v UST-Kamenogorsk JSC, which established the right of an English court to grant an antisuit injunction before arbitration proceedings had been commenced named in the FT Innovative Lawyers Report 2014 as a “stand-out” entry
  • Work on the Jivraj v Hashwani Supreme Court intervention named in the FT Innovative Lawyers Report 2012 as highly commended
  • Work on protecting clients from Belize’s anti-arbitration legislation named in the FT Innovative Lawyers Report 2011 as a “stand-out” entry
  • Named as ‘runner up’ in the Assistant Solicitor of the Year category by The Lawyer 2011
  • Inaugural annual IBA Pro Bono and Access to Justice Award 2010.
  • Contributing author: The ICSID Convention, Rules and Regulations: A Practical Commentary (Elgar Publishing, 2019);
  • IBA Arb40, Editor for “Compendium of Arbitration Practice”, October 2017;
  • The Review of the Americas 2017, Global Arbitration Review: Enforcement of Foreign Arbitral Awards in Central America and the Caribbean, co-author with Luis Gonzalez Garcia;
  • Contributor to the 24th edition of Russell on Arbitration, 2015;
  • IBA Arb 40, Editor for Report on “The Current State and Future of International Arbitration: Regional Perspectives”, August 2015;
  • Kluwer blog: “The relationship between arbitrators and parties: is the pure status theory dead and buried?” 17 June 2011 (co-author with Matt Gearing);
  • The World Arbitration and Mediation Review, ITA: “The law applicable to the award of interest: A roadmap through the maze” 2011, Volume 5, No. 1;
  • Kluwer blog: “The Public Policy Exception – Is the Unruly Horse Being Tamed in the Most Unlikely of Places?”, 17 March 2011 (co-author with Matt Gearing);
  • Global Arbitration Review, (Vol. 5 Iss. 5): “UK: Jivraj v Hashwani – the interplay between arbitration and antidiscrimination legislation”, 27 October 2010 (co-author with Mark Mansell).