Highly regarded for its experience in blockchain, cryptocurrency and technology disputes, ONTIER LLP‘s London office acts in high-stakes arbitrations under the UNCITRAL, ICC, AAA, LCIA, SCC, CIETAC, HKIAC, and SIAC rules. With extensive experience in international arbitration, London disputes head Oliver Cain ’gets very good results’; and Claire Morel de Westgaver, a February 2025 hire from Bryan Cave Leighton Paisner, is ‘a real star with an established reputation in international arbitration’. Felicity Potter departed the firm in September 2024.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘Ontier has a particularly strong presence in the London, Spanish and Latin American markets, and is well-resourced.’
‘A real powerhouse in arbitration and dispute resolution, and they have an excellent base of global clients.’
‘They will dominate any dispute that requires enforcement in certain jurisdictions.’
‘Their team is well structured, with the appropriate balance of partners and associates, meaning that clients have the right balance of experience and cost. They routinely handle arbitrations under all of the major London, international, and Hispanic institutional rules.’
‘Oliver Cain is a very impressive litigator. He explains the UK system with ease, and gives clear guidance about where the case is going. He gets very good results.’
‘Claire Morel de Westgaver is a real star with an established reputation in international arbitration.
Work highlights
Acting for a Portuguese multinational energy corporation in LCIA arbitration proceedings against a Spanish energy utility company, in respect of high-value claims and counterclaims (arising out of an EFET general agreement for the supply of natural gas).
Assisting a luxury goods group with a high-stakes dispute, arising out of multiple cross-border agreements and involving multiple sets of London-seated arbitration proceedings.
Acting for a Chinese shipyard in respect of an appeal by two German ship-owning companies under section 67 of the Arbitration Act 1996, arising out of an LMAA award concerning alleged defects in the construction of two car truck carriers.
Lawyers
Next Generation Partners
Junior partners with significant recognition from clients and peers in the market and key roles on multiple matters.
Practice head
Oliver Cain
Other key lawyers
Claire Morel de Westgaver; Nicholas Dawson