Constantine Law Expands its Regulatory Practice with hard hitting new partner hire
- John Hayes
- Mar 5
- 3 min read
John Milner joins as fifth partner in expanding Regulatory team
Elsewhere Shauna Clark becomes law firm’s first newly qualified solicitor
5 March 2025, Constantine Law, the consultant-led “agile” employment and regulatory specialist law firm has recruited a new high profile and highly respected partner, John Milner to its growing regulatory team. John’s appointment takes Constantine Law’s specialist regulatory practice to a headcount of five partners. The firm now has a total number of 16 partners overall and a total of 22 fee earning staff.
John joins Constantine Law from IBB Law where he headed the business crime and fraud team of the top tier South East regional practice. He is a highly experienced litigator with a further 12 years’ experience in the London market at a top 20 law firm prior to that.
John specialises in representing individuals in white collar crime investigations, either as a witness or suspect and principally in relation to business crime matters - financial crime, fraud, tax evasion, bribery and corruption, insider dealing and money laundering.
He has represented defendants in some of the most significant criminal trials of the last decade including:
A New York based derivatives trader in the SFO Barclays USD Libor trial.
A Danish UK based trader acquitted in the SFO Barclays/ Deutsche Bank EURIBOR trial.
An Italian company director in the SFO Bertling trial.
An Italian banker acquitted of all charges in a fraud on a Russian investment bank and US Asset Management company.
A former UBS compliance officer in an FCA insider dealing conspiracy.
A French banker in the NCA trial of a £multi-million fraud against the Libyan sovereign wealth fund.
The first defendant in the SFO Unaoil trial.
John is regularly instructed to advise witnesses and potential witnesses in compelled s2 interviews conducted by the SFO including their investigations into Glencore, Raedex Consortium, Tesco and Serco.
Current instructions include advising a client in the Post Office Inquiry and ongoing MPs investigation and advising a company director in an ongoing high profile NCA investigation.
John was named by Chambers & Partners 2025 as: Star individual in Financial Crime the regions. Chambers said: “John Milner is one of the principal players in the white-collar community. He’s highly experienced and can always be relied upon.” And in Chambers & Partners 2024: “John is top drawer and has a vast wealth of experience. There isn’t anyone better.”
According to Legal 500 2025 Fraud White Collar Crime (advice to individuals) South East: “John is pure gold. He is highly intelligent and very industrious, has bags of experience , knows (and charms) everyone and is one of the very best strategists out there.”
Commenting on the new appointment, Managing Partner John Hayes said, “We warmly welcome John to the firm. His top-ranking reputation and wide-ranging experience bring significant gravitas and added depth to our regulatory practice. Legal advice on regulatory, financial crime and misconduct matters is a growing market - both for individuals and for businesses and we are seeing an exponential rise in fraud cases before the UK courts. John’s appointment will boost our reputation in this area further.”
Regulatory partner, Sarah Wallace added, “John is a brilliant and well-known addition to our fast-growing criminal and regulatory investigations team at a time when we are seeing a varied, complex, and international caseload. Some of our most challenging and demanding cases involve the intersection of criminal, regulatory and workplace internal investigations, and it is great to bolster our capacity to assist clients in the corporate crime arena. John’s stellar capabilities will complement our diverse and hugely experienced team and the client demand of being able to deal seamlessly with all types of investigations. We are thrilled he is joining.”
John Hayes added, ”As a firm we are expanding and our ability to recruit partners of such calibre illustrates our growing reputation as well as the attractions of working for a progressive, collegiate firm like ours without the fixed costs and targets of many firms. Our lawyers have the freedom to work and develop their work in a way that suits them best and to be rewarded according to their successes, whilst having the broader support of being part of a wider team.”
“This blend of experience, depth and agility sets us apart from other firms and we will continue to hire highly rated employment and regulatory lawyers to further develop our business.”
In addition to John Milner’s appointment, Constantine Law has also appointed its first newly qualified solicitor. Shauna Clarke qualified in 2024 and has now joined Constantine Law where she is supporting the employment team. She has experience of negotiating and advising on settlement agreements and has experience of Employment Tribunal cases.
For more information, please contact:
John Hayes
Managing Partner
Constantine Law Limited
T: 0203 696 8230
M :07769-137176