Kathryn Cassells

Senior Associate


"Thorough analysis and legal expertise. No detail of any case escapes her"

Legal 500

"A brilliant lawyer"

Legal 500

Kathryn is a diligent and strategic lawyer, with wide experience in the financial and children issues that arise from relationship breakdown. She has worked on many complex court cases and been involved in a wide range of international cases that require consideration of competing legal systems. She’s acted in cases involving injunctions for non-molestation orders & occupation orders, and is skilled in drafting pre-nuptial agreements. Kathryn is experienced in international and domestic surrogacy cases and helps parents with the parental order applications required following their children’s birth.

She is a keen proponent of Alternative Dispute Resolution (ADR), encouraging her clients to consider ways to resolve their disputes through arbitration and mediation. She is a member of Resolution, and regularly writes for their in-house journal, The Review.

She has a degree in History from the University of Cambridge in History. She studied Law as a post-graduate, obtaining a degree from the University of London and was called to the Bar in 2013. Kathryn qualified as a solicitor in 2017, with a distinction in her Legal Practice Course. She is a solicitor-advocate (with higher rights of audience). This means that Kathryn can also represent her clients in court as their advocate.


  • Kathryn represented a mother in court proceedings and secured interim leave to remove to Sweden with the child.
  • Represented a wife in a case involving worldwide freezing orders, non-compliance, and enforcement.  
  • Represented the husband/father in a multi-jurisdictional dispute, across Russia and the UK, advising on issues including recognition of a foreign divorce; whether orders obtained abroad in relation to children should be recognised by the English court; Part III; ancillary issues surrounding finances, including legal costs funding, interim financial provision, and the preservation of assets. The case went to the Court of Appeal.
  • Secured parental orders in domestic and international surrogacy cases, and as solicitor-advocate represented them herself in court.

Professional Testimonials

Client Testimonials


These are some of Kathryn's testimonials from previous clients and journals that regularly review practising lawyers.

  • Clients love her for her attention to detail and unwavering passion to get the best results for them. Legal 500 2022
  • Excellent eye for detail on all the important points, very thorough and diligent, hardworking and reassuring. Legal 500 2022
  • Already establishing a brilliant reputation in the field for her thorough analysis and legal expertise. No detail of any case escapes her. She is particularly good at assessing wider case strategy where there are inter-related financial and children issues. Legal 500 2021
  • Already a star of her generation… I have no doubt that she will be a leading family lawyer of the future. Charlotte Hartley, 1 KBW
  • An intellect, maturity and mastery of a case to rival those many years her senior. Will Tyzack, QEB
  • Exactly the kind of solicitor any client would want on their side. Daisy Hughes, 1GC