A London appeals court has cleared the way for Natalia Potanina to pursue about $6 billion in financial relief in England and Wales, forcing billionaire Vladimir Potanin to defend a major claim in London courts.

Court of Appeal clears path

The Court of Appeal has ruled that Natalia Potanina may pursue a claim for financial relief in England and Wales under Part III of the Matrimonial and Family Proceedings Act 1984. The ruling finds Potanina has enough connection to the jurisdiction despite the couple’s divorce taking place in Russia.

Potanina and her former husband, billionaire businessman Vladimir Potanin, divorced in Russia in 2014. Russian courts awarded her roughly 1% of the marital assets at that time. She moved to the United Kingdom after the Russian divorce and filed an application in England in 2019 to reopen financial remedy proceedings.

Frances Hughes, partner at Hughes Fowler Carruthers and Potanina’s representative, said the decision amounts to a second vindication for her client. "Our client is grateful for the consideration given by the court to her case and is delighted that the Court of Appeal has recognised, for the second time, the merits of her application," Hughes said.

Value and stakes

The claim lodged in England is valued at about $6 billion, making it one of the largest financial remedy claims to reach the English courts.

Key issues raised by the claim:

  • Enforcement of any English order against overseas assets
  • Asset tracing across jurisdictions
  • Recognition and potential challenge of foreign divorce awards

Lawyers and commentators say the size of the claim raises complex questions about enforcement, asset tracing and recognition of foreign divorce awards.

Hayley Trim, partner at Irwin Mitchell, described the ruling as a landmark for cross-border family law. Trim said the decision "reinforces the role of the English courts in international divorce proceedings" and signals a willingness to examine whether outcomes reached abroad give rise to concerns of fairness for one party.

English courts have long been regarded as attractive to high-net-worth individuals seeking financial remedies because of the breadth of remedies available and the courts’ powers to order redistribution of assets. That reputation will be tested again as the Potanina claim moves to a substantive hearing where the merits of the application and the size of any award will be considered in full.

Why Part III matters

Part III of the Matrimonial and Family Proceedings Act 1984 allows courts in England and Wales to determine financial relief where parties have connected themselves to the jurisdiction after a foreign divorce. The provision exists to address situations where a foreign financial order may be inadequate or unfair given a party’s ties to England.

The Court of Appeal’s finding that Potanina has enough connection to bring a Part III claim clarifies how courts may treat applicants who relocate to the UK after divorcing abroad. The issue is highly fact-specific: judges will look at factors such as:

  • residence and the timing of the move
  • domicile and other legal ties
  • family links and the capacity of England to achieve a fair outcome

Peter Burgess, partner at Burgess Mee, said the ruling "further cements London’s position as the divorce capital of the world." He added that the judgment gives the $6 billion claim "a lifeline" by allowing the substantive case to proceed in England, and suggested that high-net-worth individuals who feel disadvantaged by foreign rulings may view England as a route to challenge those outcomes.

Implications for cross-border divorce practice

The Potanina decision may prompt changes in how counsel advise clients about forum shopping and the timing of moves after foreign divorces. Counsel may place greater emphasis on the legal connections that could allow financial remedy claims to be heard in England and on strategies for protecting assets across jurisdictions.

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"The decision of the Court of Appeal is a second vindication of our client in making her application in 2019," Frances Hughes, partner at Hughes Fowler Carruthers, said. The case will now proceed to a substantive hearing where the merits and any potential award will be considered in full.