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
Dec 4, 2023
Canada Square Operations Ltd v Potter –  Supreme Court provides clarity on limitation periods in fraud context  
Introduction Section 32 of the Limitation Act 1980 provides for the postponement of the limitation period in cases of fraud,...
Nov 29, 2023
Oliver Rule joins Enyo Law from Allen & Overy
We are delighted to welcome Oliver Rule, who joins the firm as a partner. Oliver has almost two decades of...
Nov 22, 2023
The wide remit of a section 423 Insolvency Act claim
It is well known that courts are extremely reluctant to “pierce the corporate veil” and disregard the fundamental principle of...
Nov 15, 2023
High Court reiterates need to prove reliance on implied misrepresentations
The High Court has dismissed claims against Credit Suisse relating to its sale of a collateralised debt obligation (“CDO”) “as...