Jonathan Arr Partner

Jonathan specialises in international contentious trust, probate and succession disputes, high-value family disputes and commercial litigation.

The clients for whom he acts range from multinational corporations, international private wealth managers and trust companies through to a diverse spectrum of high-net-worth individuals both from the UK and from around the world, including South America, Europe and the Middle East.

Jonathan is an experienced litigator in both the UK courts and foreign courts, including Singapore, Bermuda, the Cayman Islands, BVI, the Channel Islands, the Isle of Man and Mauritius. He acts on the full range of matters affecting private clients including breach of trust claims, fraud claims, blessing applications, challenges to wills, Inheritance Act claims, art and cultural property disputes and applications to deal with mistaken advice or flawed decisions by way of rectification or revocation. He has particular expertise resolving difficult and long-running disputes between beneficiaries of both English and offshore family trusts owning large multinational businesses.

As well as acting in court proceedings, he has also advised clients in numerous successful large-scale settlement negotiations and mediations, particularly in the context of family disputes. Jonathan is a member of the Association of Contentious Trusts and Probate Specialists.

Jonathan also has substantial expertise in high-value employment law and commercial disputes, acting for financial institutions, in particular, in the High Court and employment tribunals.

What people are saying


"Jonathan Arr is brilliant. Incredibly bright, and charming and commercial with it. I would have no hesitation in recommending him to anyone looking for advice in this area."

The UK Legal 500 2021

"A lovely person, so affable and pleasant to work with. He's obviously a subject matter expert who knows the law, and he can take that expertise and give you actually useful advice."

Chambers HNW 2021

"A fantastic lawyer [who has] a really barristerial mind for cases."

Chambers HNW 2021

"A pleasure to work with, a great combination of technical ability and strategic oversight."

Chambers HNW 2021

"He is very strong - he is one of the brightest partners in the City. He is also very pragmatic and a solutions-oriented lawyer."

Chambers HNW 2020

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