Russell Cooke Bedford Row Holborn

About Katie

My role is to help people navigate what can be one of the most difficult times of their lives. I understand both the emotional and legal issues involved when a relationship breaks down and use my professional skills with my considerate but determined approach to get matters resolved in the best way possible.

Katie advises across the full breadth of family law with many of her cases involving an international element. She is a Resolution trained family mediator in financial and private law children matters.

Her specialist acumen is in cases involving international child relocation and disputes involving child arrangements. She advises on divorce, relationship breakdown and managing the associated financial matters. She also assists with the drafting of nuptial agreements. Her clients range from HNW individuals, international entrepreneurs and families of inherited wealth. 

Katie is ranked in Chambers HNW 2023 (Band 5 for Family/Matrimonial Finance: High Net Worth - London) as well as a Recommended Lawyer in Legal 500 2024.

Katie is passionate about all her clients, capable, unflappable and very well respected by her peers.
The Legal 500 (2025)

Education

  • Read History at King’s College London, 2000-2003
  • Completed the General Diploma in Law (GDL) at the College of Law, London, 2003-2005
Kate is a good lawyer and mediator.
Chambers UK (2025)

Experience

Katie qualified in 2007, joining the boutique family law firm Alexiou Fisher Philipps as a solicitor in 2011, later becoming a partner at the firm in 2016.

She has been involved in the following notable cases: 

  • Re L (Residence: Jurisdiction), the Court of Appeal case W (Children) on relocation
  • the influential High Court decision JKN v JCN addressing the jurisdiction of a transatlantic divorce
Katie Longmate has cemented herself in the mediation world. A super human touch regularly helps clients reach successful outcomes.
The Legal 500 (2025)

Memberships

Katie is a:

  • member of Resolution and its Wellbeing Committee

Katie's highlights

News

18.07.2024

Record number of Russell-Cooke’s private wealth specialists ranked in Chambers High Net Worth (HNW) guide

Russell-Cooke has made significant strides in the 2024 edition of Chambers High Net Worth, picking up first-time rankings in the...
James Carroll, Joint Managing Partner in the Russell-Cooke Solicitors, family and children team. Fiona Read, Partner, Russell-Cooke Solicitors, Family team Hannah Minty, Partner in the Russell-Cooke Solicitors, family and children team. Jemma Pollock (1) Family and children partner - Katie Longmate | Russell-Cooke Kate Hamilton, Partner in the Russell-Cooke Solicitors, family and children team. Simon Mapstone, Consultant in the Russell-Cooke Solicitors, real estate, planning and construction team. Sarah Reynolds, Senior associate in the Russell-Cooke Solicitors, property law and conveyancing team. Matt Bosworth, Partner in the Russell-Cooke Solicitors, regulation and compliance team.
Multiple Authors
2 min Read
James Carroll, Fiona Read, Hannah Minty, Jemma Pollock, Katie Longmate, Kate Hamilton, Simon Mapstone, Sarah Reynolds, Matt Bosworth
News

13.06.2024

Four Russell-Cooke partners recommended in Spear's 500 2024

Russell-Cooke is delighted to announce that four partners across our family and children and criminal and financial crime teams have been recognised in Spear's 500...
Fiona Read, Partner, Russell-Cooke Solicitors, Family team Kate Hamilton, Partner in the Russell-Cooke Solicitors, family and children team. Family and children partner - Katie Longmate | Russell-Cooke Frances Murrey, Partner in the Russell-Cooke Solicitors, crime and financial team.
Multiple Authors
1 min Read
Fiona Read, Kate Hamilton, Katie Longmate, Frances Murray
News

22.01.2024

Russell-Cooke grows family team with new partner Katie Longmate

Law firm Russell-Cooke has welcomed Katie Longmate as partner in the family team...
James Carroll, Joint Managing Partner in the Russell-Cooke Solicitors, family and children team. Family and children partner - Katie Longmate | Russell-Cooke
Multiple Authors
1 min Read
James Carroll, Katie Longmate
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