Mishcon de Reya LLP is highly skilled in handling complex, high-value contentious trusts and succession matters. Department co-lead Mark Keenan specialises in complex domestic and international trust and succession disputes for a range of ultra-high-net-worth clients, and co-head Peter Steen is esteemed in both onshore and offshore contentious trust circles and regularly handles high-value, complex cross-border trust disputes. Jessica Medus oversees on cross-border matters involving Guernsey, Switzerland, France, Kazakhstan, the US, and Bermuda, Emilia Piskorz has been active in multi-jurisdictional trusts and succession disputes, including onshore and offshore financial centres worldwide, and Victoria Sara-Kennedy is knowledgeable in matters related to contested wills, Inheritance Act claims, the Court of Protection, and charity disputes. James Smith has been key in litigation related to trusts, succession, and mental capacity. Leo Bosco joined the team from Britton and Time in August 2025.
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Testimonials
Collated independently by Legal 500 research team.
- This team at Mischon is rightly highly regarded and, to an extent, feared by its peers. The partners are all highly experienced litigators with a deep knowledge of the sector. They instill confidence in clients and are fearless.
- Peter Steen - calm and collected, adapts to the point at hand (i.e. client-facing vs opposition-facing), takes the time to understand and care. Available and responsive.
- The level of skillset and professionalism is very high. They are very personable and care for the client and their affairs.
- Within the division, we mainly work with Emilia Piskorz (Partner) and Lawrence Hiller-Wood (Associate). Emilia stands out for her strong technical expertise and clear strategic judgment in a complex cross-border trust dispute. She has a firm grasp of the details, is highly responsive, and is consistently helpful in steering a pragmatic way through a difficult and fast-moving matter. Lawrence provides very solid associate support, with excellent organization, responsiveness, and careful attention to the day-to-day running of the case.
- Victoria Pigott and Emilia Piskorz are both hugely knowledgeable and always go the extra mile for clients. At Managing Associate level, I would single out Emily Bueno and Natasha Holme as stars of the future.
- The breadth and depth of the expertise and experience throughout the team, along with excellent resources, support their clients.
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Practice head
Mark Keenan; Peter Steen
Other key lawyers
Jessica Medus; Emilia Piskorz; Victoria Sara-Kennedy; James Smith; Leo Bosco