Our Team

Katie Marquet-Horwood
Qualifications & Education
  • PhD Literature, University of Nottingham
  • English Language & Literature (BA), University of Oxford
  • Law Society of England and Wales

Katie specialises in complex and high value commercial dispute resolution across a wide range of industry sectors, typically with an international element. She has experience of litigation before the English courts, major arbitral institutions and local courts in a number of jurisdictions, acting for major UK and foreign corporations and state-owned entities, as well as high net worth individuals.

Katie has been recognised as one of “the City’s brightest stars” by Legal Business and as a key lawyer by Legal 500 for her skills in international arbitration.

Katie has acted on some of the most significant cases to come before the English courts in recent years, including the first case to be heard under the Shorter Trials Scheme.


Katie has a first class degree in English Language and Literature from the University of Oxford and a PhD in Literature.

Since qualifying at Mayer Brown International in September 2010, Katie has practised at Milbank, Tweed, Hadley & McCloy and Addleshaw Goddard, from where she joined Enyo Law in March 2019.

Reported cases include
  • NBT & Anr -v- Mints & Ors [2022] EWHC 871 (Comm)
  • NBT & anor -v- Boris Mints & ors [2023] EWHC 118 (Comm)
  • First Abu Dhabi Bank PJSC -v- BP Oil International Ltd. [2018] EWCA Civ 14
  • Chudley & Ors -v- Clydesdale Bank PLC (t/a Yorkshire Bank) [2017] EWHC 2177 (Comm)
  • AstraZeneca UK Limited -v- International Business Machines Corporation [2011] EWHC 306 (TCC)
  • Re Sigma Finance Corporation (in administrative receivership) [2009] UKSC 2
Representative Matters
  • Four members of the same family defending a USD850 million fraud claim brought by two banks majority owned and controlled by the Central Bank of Russia in the English Commercial Court. The claims are entirely governed by Russian law.
  • PETRONAS in its successful defence of a USD1.14 billion claim for fraudulent misrepresentation and breach of contract arising out of the termination of its investment in a Brazilian off-shore oil project. PETRONAS was awarded USD15 million in costs. ICC, Rio de Janeiro Seat, English law.
  • A major US agrochemical company in a series of high value Bermuda Form insurance arbitrations concerning coverage for c. USD9 billion of personal injury claims brought by US claimants and state departments
  •  A joint venture owned by major Russian and Italian Banks in a USD70 million LCIA arbitration claim against its co-partner arising out of breaches of a Shareholders' Agreement concerning the oil and gas sector in Russia.
  • An oil major in relation to ESG issues in sub-Saharan Africa.
  • A state-owned oil corporation in ad hoc arbitration proceedings arising out of a fraudulently procured contract, together with a section 67 jurisdictional challenge in the English Commercial Court.
  • A Puerto Rican company in LCIA arbitration proceedings against an Italian company arising out of the wrongful termination of a distribution agreement.
  • In LCIA arbitration proceedings between two leading Israeli and Chinese satellite operators in relation to claims for breach of contract and misrepresentation arising out of the critical malfunction of a communications satellite.
  • A former CEO in relation to FCA and Insolvency Service proceedings arising out of one of the most high profile UK corporate collapses in recent years.
  • Rabobank in relation to the complex, multi-jurisdictional investigation of LIBOR and EURIBOR manipulation.
  • Political risk insurers in two multi-million dollar LCIA arbitration proceedings concerning the Indonesian coal sector.
Professional Associations
  • ICC Young Arbitrators’ Forum
  • LCIA Young International Arbitrators Group
  • Arbitral Women
Jul 9, 2024
The importance of directors’ knowledge in establishing the largest ever wrongful trading award and the first ever award for “misfeasant trading”
The High Court recently issued its judgment against two former directors of BHS Group Limited, Mr Henningson and Mr Chandler...
Jul 4, 2024
Supreme Court rules that planning authorities cannot give permission for oil drilling projects without considering the environmental effects of the oil’s combustion
On 20 June 2024, the Supreme Court handed down its judgment in R (on the application of Finch on behalf...
Jul 2, 2024
UK sanctions ground payment obligations under letters of credit in aircraft leasing case
In Celestial Aviation Services Limited v UniCredit Bank GmbH, London Branch [2024] EWCA Civ 628, the Court of Appeal held...
Jun 13, 2024
Fair winds favour plaintiffs in wasted expenditure cases
A recent judgment of the High Court of Australia has clarified aspects of contract law and the availability of damages...