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Testimonials
Collated independently by Legal 500 research team.
‘The team has a great mix of incisive and interrogation skills, as well as deft tact and diplomacy, that serve not only their clients but also tribunals too. They have great experience across international arbitration, including in investor-state work for both repeat state clients and investors. They are hands on and not afraid to do the advocacy work themselves.’
‘Quiet, reserved confidence, and unfazed. The arbitration team is a truly global practice, with lawyers with diverse experience in a variety of jurisdictions. It is a truly international arbitration practice.’
‘ES' international arbitration practice is very well led and organised. Great skill and commercial awareness. The team is very cohesive and tailored to clients’ needs.’
‘Mark Howarth is a real star. He is calm, considered and hugely experienced. He is also a pleasure to work with.’
‘Jonathan Leach - excellent, very approachable and personable, always taking the time to explain difficult concepts in a simple, yet comprehensive, way. He is a superb leader, and very cool and collected under pressure. He makes sure that when he arrives at a hearing, his client is in the best possible position.’
- ‘Katia Finkel - excellent. Absolutely outstanding in her cross-examination of other sides’ experts. Leaves no stone unturned. Katia is a very smart, skillful and reliable professional.’
‘James McKenzie has excellent client-handling skills.’
- ‘Wilson Antoon is not afraid to get stuck in. He is extremely sharp, picks up points very quickly, and sees the case from all sides.’
Key clients
- National Iranian Oil Company
- Malaysia’s Minister of Finance (Incorporated)
- 1Malaysia Development Berhad
- State of Libya
- Islamic Republic of Iran
- SBEC Systems
Work highlights
- Representing the National Iranian Oil Company in a long-running London-seated arbitration, which relates to sales of Iranian gas to the UAE under a long-term gas sale agreement.
- Acting in parallel arbitration and court proceedings for two Malaysian government entities against two Abu Dhabi government entities in the 1MDB fraud, which involved the theft of billions of dollars from the Malaysian people by individuals, including the former Prime Minister of Malaysia, Najib Razak.
- Acting for the Islamic Republic of Iran in several large-value cases, in relation to the Iran United States Claims Tribunal (IUSCT) matter, the IUSCT established by the Algiers Accords in 1981 and now regarded as a pillar of public international law.
Lawyers
Hall of fame
The lawyers at the very top of the profession, widely known and respected by peers and clients for their longstanding involvement in market-leading work.

Next generation partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Wilson Antoon

Katia Finkel
Leading associates
Leading associates with regular involvement in their team's key work, and recognition from peers or clients as being ones to watch.
Practice head
Jonathan Leach
Other key lawyers
Mark Howarth; Richard Little; Sheena Buddhdev; Kate Lomas; Luisa Zukowski; Alex Cook; Katia Finkel; James McKenzie; Wilson Antoon