Thomson Reuters names eight Keystone Law partners in its Stand-out Lawyers Guide 2026
Andrea James, Andrew Darwin & Anna McKibbin
Jonathan is a family law solicitor and a leading court litigation specialist who represents a wide range of clients, including high-profile individuals across the UK, on divorce. He is regularly instructed in cases involving a significant income disparity between spouses, acting for both financially stronger and financially weaker parties. He also has experience in matters involving allegations of controlling behaviour or financial abuse.
Jonathan’s work frequently overlaps with other legal jurisdictions, including the criminal courts, where he is experienced in representing divorce clients who are in prison or have previously been convicted of a crime.
Outside of his legal practice, Jonathan leads walking groups across the country for individuals affected by relationship breakdown and abuse. These groups, some of which he founded and continues to run, provide informal peer support and are recognised by the mental health charity Mind.
Jonathan advises on divorce and wider family law matters, representing clients in financial settlements and child arrangements, and achieving confidential, negotiated outcomes that resolve disputes effectively without the need for court.
Experience
Jonathan represents clients in contested family disputes, securing injunctions, asset recovery, and cost orders, defending against false allegations, and ensuring financial fairness in complex divorce litigation and high-stakes court proceedings.
Experience
Jonathan advises on high-profile family disputes involving significant wealth, international assets and public figures, representing clients in complex litigation and securing confidential settlements that protect financial interests and reputational concerns.
Experience
Jonathon has acted in numerous reported family law cases, including complex divorce, asset, and child arrangements, demonstrating expertise in precedent-setting litigation and contributing to the development of family law jurisprudence.
Experience
Please note: The experience list above may include examples of work completed prior to joining Keystone Law.
Recognised by The Legal 500 for Family Law 2024
“Jonathan Day is excellent. He has a wonderfully calm manner with clients. He also has a comprehensive legal knowledge and good judgment.”
The Legal 500 2024
“Ppersonable, intelligent and hardworking.”
The Legal 500 2023
“Responsible for the heavy lifting.”
The Legal 500 2022
Jonathan qualified as a solicitor in 2015. Prior to joining Keystone Law in 2024, he worked at the following firms: