John Warrington > Chambers of David Josse QC > London, England > Lawyer Profile

Chambers of David Josse QC
5 St Andrews Hill
John Warrington photo

Work Department

John practises in crime and business crime, asset recovery, civil fraud & confiscation and professional discipline & regulatory.


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

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.

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 toxic sewage discharge cases, as well as acting in matters of asbestos related offending.

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.

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 qualified to accept direct access instructions.


John was called to the Bar in 2000.
List of Specialist Regulatory Advocates in health and safety and environmental law (List B).
General Dental Council (GDC) appointed advocate: Band C (10 years’ call and above).
The Bar Standards Board (BSB) panel.
The London Boroughs Legal Alliance panel (Band A).
Crown Prosecution Service advocate panel, including the specialist Fraud, Proceeds of Crime and Serious Crime panels.


  • Association of Regulatory and Disciplinary Lawyers.
  • UK Environmental Law Association.
  • Fraud Lawyers Association.
  • Criminal Bar Association.
  • South Eastern Circuit (Committee Member).
  • North London Bar Mess.
  • Kent Bar Mess.

Lawyer Rankings

London Bar > Crime

(Leading Juniors) Ranked: Tier 3

John Warrington5 St Andrews HillJohn 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.