John Warrington

John is a barrister specialising in professional disciplinary proceedings, regulatory and criminal law.

John is a barrister specialising in public law, crime, regulatory law and professional disciplinary proceedings.  Within these fields, his principal areas of interest include public inquiries, serious organised crime, high-value financial crime, environmental law, health and safety and the regulation of healthcare professionals, He is ranked as a leading criminal barrister at the London Bar in Chambers and Partners UK Bar Guide and The Legal 500.

Regularly instructed in cases of the utmost seriousness, John has acted in matters of homicide, serious violence, multi-million pound fraud, high profile corruption and large-scale drug trafficking.  His advisory work often involves instructions at the pre-charge or investigative stage.  He provides advice and representation to high-profile executives and performers within the music and entertainment industries, including Grammy and Ivor Novello award-winning recording artists.

Litigation relating to incidents arising from serious regulatory breaches, often involving corporate defendants, forms a significant part of John’s practice.  Latterly, he has defended and prosecuted a number of serious toxic sewage discharge cases, as well as acting in matters of risk to life health and safety breach and asbestos related offending.

John’s criminal law pedigree lends itself well to his increasing popularity in the professional disciplinary tribunals.  He often acts in sensitive cases involving tandem criminal and disciplinary issues, in particular those concerning professionals with substance misuse or mental health problems.  He is also experienced in matters related to serious clinical failings.  He has particular expertise in the dental and nursing professions.

In addition to his busy practice, John is a qualified advocacy tutor and regularly lectures and provides training on various aspects of his core practice areas.

John is currently acting as deputy first-junior counsel to a long-running and complex public inquiry.

What the Legal Directories say about John Warrington:

‘ A highly talented advocate. He works incredibly hard, and combines good judgement with an eye for detail. ’

The Legal 500 2022

"An effective advocate who understands the wider picture and provides clear and concise advice."

Chambers & Partners 2021.

"John is a highly experienced barrister who has a great practice prosecuting and defending in criminal cases. Technically impressive and incredibly thorough in his preparation on cases. He has a light touch in court."

The Legal 500 2021.

"Surgical in his approach to cases, he can ingest large volumes of evidence."

The Legal 500 2020.