James Lewis KC KC > Chambers of James Lewis KC & Hugo Keith KC > London, England > Lawyer Profile

Chambers of James Lewis KC & Hugo Keith KC
Three Raymond Buildings


Joint Head of Chambers.
A specialist in both civil and criminal cases. Vastly experienced in criminal, civil and commercial fraud, extradition, regulatory work, contempt, public international law and judicial review matters. Appears frequently at first instance, the Court of Appeal and in the Privy Council and the Supreme Court as well as other foreign jurisdictions being additionally called ad hoc to the bars of Gibraltar, Cayman Islands, Brunei, Trinidad and Tobago and Ireland. Often used as an experienced litigation strategist and advocate who can advise and represent companies and individuals in respect of commercial, regulatory and criminal issues, particularly those with an international dimension. Extensive trial and appellate experience in matters of mutual assistance, extradition and commercial fraud, which encompasses international cooperation concerning search and seizure of documents, letters of request, warrants and other international treaty matters. Has acted for and against at least 20 overseas governments.


Called 1987, Gray’s Inn; admitted ad hoc to the Bars of Gibraltar and the Crown Colony of the Cayman Islands; Attorney General’s list since 2000; assistant recorder 2000; SILK 2002. Appointed to the criminal committee of the Judicial Studies Board 2008; member of the advisory group to the sentencing guidelines council 2010; authorised to sit as judge of the Central Criminal Court 2011; deputy High Court judge assigned to the Administrative Court 2013; appointed to the SFO Prosecution List 2013.  Election Commissioner (High Court Appointment) 2016.  Joint Head of Chambers 2020.


BSc (Hons); Diploma in Law.

Lawyer Rankings

London Bar > Fraud: crime

(Leading Silks)Ranked: Tier 2

James Lewis KC – Three Raymond Buildings

London Bar > International crime and extradition

(Leading Silks)Ranked: Tier 2

James Lewis KCThree Raymond Buildings

Three Raymond Buildings‘s James Lewis KC has appeared in 17 appeals in the Supreme Court both for governments and for defendants, and a standout highlight of his from 2021 was representing the CPS, on behalf of the US government, in the Julian Assange extradition proceedings . Rachel Barnes KC, who was appointed silk in 2022, recently appeared in USA v Adeagbo & Ors, an extradition request relating to a series of ‘business email compromise frauds’. Ben Watson KC, who specialises in extradition and is praised for his ‘great judgement‘, acts for requested persons and the CPS in high-profile cases.

London Bar > Business and regulatory crime (including global investigations)

(Leading Silks)Ranked: Tier 3

James Lewis KCThree Raymond Buildings