Mark Kosmin


Mark is a highly skilled and experienced family solicitor, mediator and collaborative lawyer who is committed to finding practical, creative and cost-effective solutions for clients.

Mark qualified as a solicitor in 1997 and joined Freemans in January 2012, becoming a partner in May 2017. He specialises in assisting individuals on a wide range of family law issues. These include cohabitation and marital (i.e. pre and post nuptial) agreements, inheritance disputes, divorce, civil partnership, separation, financial arrangements, arrangements for children, as well as international child abduction and child relocation cases.

Mark has represented individuals from a wide variety of backgrounds, personal circumstances and professions. His clients have included many high net worth individuals, company directors, bankers, musicians and people from the entertainment industry.

Mark provides a bespoke, tailor-made approach to meet the needs of individual clients and families. Mark is committed to helping clients resolve their finances and arrangements for children in a dignified and constructive way, outside the courtroom wherever possible.

Mark has been a Resolution accredited specialist family lawyer since 2004, with particular specialisms in international child abduction and cohabitation.

Mark is a member of Resolution and has been a committee member of Resolution London Region since 2012.

Mark is frequently instructed by the government’s International Child Abduction and Contact Unit to represent parents in international child abduction cases.

Mark is also a member of the:

  • the Child Abduction Lawyer’s Association (founder member);
  • the International Bar Association;
  • the International Academy of Collaborative Professionals.

He is a founder member of the North London Collaborative practice group (or ‘POD’) for which he has acted as Liaison Officer since its foundation.

Mark is married and has children and was a school parent governor from 2009 to 2015. He has varied interests, including history, steam heritage and the arts. He is a musician and a songwriter and has played in several bands.

Mark has also been ranked as a Recommended Family Lawyer in the Spear’s 500 Index for 2024 in recognition for his expertise in divorce, cohabitation and financial arrangements as well as non-court dispute resolution.

Reported cases:

  • UD v DN (Schedule 1, Children Act 1989; Capital Provision) [2021] EWCA Civ 1947 – Court of Appeal
  • DN v UD (Sch 1 Children Act: Capital Provision) [2020] EWHC 627 (Fam)
  • R v K (Abduction: Return Order) [2009] EWHC (Fam) [2010] 1 FLR 1456
  • Re JB (Child Abduction) (Rights of Custody: Spain) [2003] EWHC 2130 (Fam) [2004] 1FLR 796

What they say about Mark

I would like to emphasise that Mark Kosmin is obviously a very considerably talented solicitor. Obviously he has competitors who are certainly as good and well known as him but he is up there as one of the market leaders. I would recommend anyone to take their case to him. I particularly valued his thoroughness, calmness under fire and skill in dealing with a difficult client’. (2023 Edition of The Legal 500)
Mark Kosmin handled my case with dignity, empathy, and thoroughness. He always set realistic expectations and I was very satisfied with his advice and the overall service that I received from Freemans.
Freemans has strength in depth across all areas of family law. Rather than becoming a niche practice, they have maintained a presence across all areas of family law, and offer experience at all levels. Nina Hansen is the doyen of international family lawyers. She has the ear of judges and is hugely respected. Mark Kosmin and Gina Stavrou (finance) are both stand out junior partners’. (2023 Edition of The Legal 500)

If you need help with an interview, whether by the police or another investigating agency,
please call our emergency number, our line is open 24 hours a day.

See how we can help you

Legal Service
Your details

By submitting this form I am agreeing to the full Privacy Policy of this website.