Surrogacy and Succession

The High Court has given its blessing for the younger child of the Eighth Marquess of Bath, Ceawlin Thynn (“the Marquess”), born by surrogacy in the United States, to be added to the class of beneficiaries of his family trusts in the future.

The Detail

The case concerns three substantial family trusts connected to the Longleat Estate in Wiltshire. The Longleat Estate is one of the most prominent landed estates in England, with an estimated value of approximately £200–£215 million.

The Marquiss (the current life tenant) is the principal beneficiary of three family trusts. These discretionary family trusts are long-standing, dynastic structures, designed to preserve family wealth and pass it on to future generations. While the precise number of trust beneficiaries is not fixed (as is typical in such discretionary trusts), the class is already extensive, including multiple family members across generations.

The Marquess, and his wife, Emma, have two sons: John (born in 2014) and Henry (born in 2016). Henry, now about nine years old, was born through a gestational surrogacy arrangement in the United States after the Marchioness experienced serious, potentially life-threatening complications during her first pregnancy.

Although Henry is the biological child of both parents, uncertainty arose because the trust deeds expressly adopt pre-1970 common law definitions of terms such as “child”, “grandchild” and “issue”. There was a question as to whether, children born via surrogacy automatically fall within those definitions, creating ambiguity as to Henry’s entitlement to benefit.

To address this, the trustees applied to the High Court for approval (a “blessing”) to exercise a power of advancement in favour of the Marquess – enabling Henry and Henry’s future descendants to be brought within the beneficial class at a later stage.

Sitting in the High Court, HHJ Paul Matthews approved the proposed exercise of the trustees’ power of advancement. He was satisfied that the trustees’ proposal was proper and rational: it was of material benefit to the Marquess (so that he does not have to provide for Henry out of his own resources) and also avoids any inequitable treatment between the Marquess’ children.

Although the trustees’ intention is not to exercise the power at this stage (largely due to US tax considerations linked to Henry’s US birth), importantly, the decision provides flexibility for the future.

Family Background and Wider Context

The Thynn family, custodians of the Longleat Estate for generations, are one of the UK’s best-known aristocratic families. Many aristocratic families like the Thynns do not hold their wealth and land outright, but instead it is structured through trusts designed to preserve assets across generations.

Traditionally, such structures rely heavily on historic legal language. This case demonstrates how out-dated language found in trusts, can struggle to accommodate modern family arrangements.

Henry’s circumstances have attracted legal and public attention because he is widely regarded as one of the first children born via surrogacy into the British aristocracy, placing the issue squarely into the spotlight.

While no individual beneficiary of the family trusts publicly “objected” to Henry’s inclusion, the court process recognised that expanding the class of beneficiaries could potentially dilute the interests of existing and future beneficiaries. An independent representative was appointed to represent the wider class of beneficiaries as a protective measure.

Why This Outcome is Noteworthy

Although this case does not determine who will inherit the title of Marquess of Bath. John, the Marquess’ elder son, remains the heir to the title. What this case concerns is financial succession, not title succession. In other words, it is about who benefits from the family wealth, not who inherits the peerage. Ensuring that both children are treated fairly within the trust structure has important family and reputational implications.

Although this case involves a high-profile family and a substantial estate, its relevance extends far beyond aristocratic wealth.

The judgment highlights three key points:

1. Outdated legal drafting can have modern consequences

2. Trustees must act fairly across the whole family

3. Planning ahead is essential

Final Thoughts

Although the Court in Cator v Thynn did not resolve the underlying legal question of whether a surrogate-born child falls within traditional common law definitions of “issue”, it took a pragmatic approach: confirming that trustees can use their powers to achieve a fair and modern outcome.

What is plain to see is that there is a now broad judicial willingness to adapt long-standing legal principles to contemporary family realities. There is a message to be found for practitioners and families alike: ensure that trust structures are reviewed regularly to ensure they keep pace with social and medical developments.

Should you have a legal issue relating to Inheritance and Trusts Disputes, Marina Leigh would be happy to assist and can be reached here.