Mark Rennie, Lawyer, Partner & Group Head Family Sussex, Dispute Resolution Family, DMH Stallard
Mark is a family law specialist advising on all areas of matrimonial law and assisting parties in resolving financial disputes arising from the breakdown of their relationship.  He has particular experience in dealing with cases which involve business ownership.

Known as an effective litigator, handling complex disputes in both high and mid net worth cases, Mark seeks to bring a warm and human touch to a process which some people can find difficult. It is his aim for his clients to feel supported throughout.

In addition to matrimonial law, Mark frequently advises on Inheritance Act claims and will disputes.  He has successfully negotiated many pre-nuptial agreements and has a keen interest in wealth preservation.

Mark can also advise and assist if you are not married but need support resolving your financial situation following the breakdown in your co-habitation.

Mark works primarily in our Horsham office but also collaborates closely with colleagues in our other locations.

Work highlights

ULTRA HIGH NET WORTH DIVORCE

GA v EL [2023] EWFC 187 and GA v EL (No. 2) [2023] EWFC 206. The case concerned a single issue; how to divide the proceeds of sale of a business that was started during the marriage but sold after separation. The case considered the importance/relevance of historic business valuations and the courts approach to post separation endeavour.


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Recent articles

Announcements

DMH Stallard recognised as a Top Family Law Firm in eprivateclient

DMH Stallard has once again been recognised among the UK's leading family law practices, securing a Tier 2 ranking in the latest eprivateclient Top Family Law Firms guide.

26/10/2026

Announcements

DMH Stallard celebrates ‘tremendous’ Chambers 2027 rankings

DMH Stallard has reinforced its position as the South East's leading law firm with another strong performance in the Chambers and Partners 2027 legal rankings.

20/10/2026

Podcasts

Neurodivergence in children

In this episode of Family Law in the UK we explore the impact of neurodivergence in children, and how the court system address their needs.

26/08/2026

Announcements

DMH Stallard Family team shortlisted for two prestigious Resolution Awards

DMH Stallard's Family team has earned national recognition with two nominations at the Resolution Awards 2026.

11/08/2026

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