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 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 and the British Virgin Islands, and he has particular expertise in resolving sensitive and long-running disputes between beneficiaries of both English and offshore family trusts.

He has advised clients in a number of successful 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


"He is very strong - he is one of the brightest partners in the City. He is also very pragmatic and a solutions-oriented lawyer. He loves the law and will pick out a strong technical argument, he's very versatile."

Chambers HNW 2019

"He "excels in cases that have a stronger emotional aspect. He is good at arguing his client's case but also reaching a resolution.""

Chambers HNW 2019

"The 'organised, very determined and assured' Jonathan Arr 'has established himself as a major presence in the sphere of international trust litigation."

The UK Legal 500 2018

"Up-and-coming partner Jonathan Arr acts on a broad range of contentious trust matters, and is praised for producing 'top-quality work' that belies his experience."

Chambers UK 2018

"'He is highly intellectual, sensible and very commercial,' says one source, and another notes that 'he has a sharp mind and a great feel for litigation'."

Chambers UK 2018

"Jonathan has 'a razor-sharp mind and a great feel for litigation. He is tenacious and hardworking and handles his cases brilliantly'"

The UK Legal 500 2017

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