Kathryn Howarth practices in public international law, extradition and public law. She is on the Attorney General’s Public International Law Panel of Counsel and the Attorney General’s Civil Panel of Counsel. She is instructed by UK and foreign government departments and individuals. Kathryn is described in the Legal 500 as combining “intellectual strength with an imperturbable, yet reassuring, court manner”.


  • Mansfield Scholar (Lincoln’s Inn)
  • Denning Scholar (Lincoln’s Inn)
  • Howland Prize for the Most Outstanding Performance on the LL.M (University of Toronto)


“Kathryn is a very experienced advocate in the field on international criminal law. She is practical and balanced, she is hard working and has good attention to factual details and a strong understanding of the legal issues.”
Legal 500 2021

“Kathryn is a careful and measured advocate, in  and out of court. She is very intelligent and brings her experience of international crime to the field of extradition, to the benefit of clients. She is very calm and pleasant to work with.”
Legal 500 2021

“She combines intellectual strength with an imperturbable, yet reassuring, court manner.”
Legal 500 2020, Leading Juniors, International Crime and Extradition

“A well–rounded, hardworking and energetic advocate.”
“Up and coming junior”.
Legal 500 previous entries


  • Attorney General’s Public International Law Panel (B-Panel)
  • Attorney General’s Civil Panel of Counsel (C-Panel)
  • CPS Specialist Extradition Panel – Level 3
  • CPS Advocate Panel – Level 3


  • M.A. (Cantab)
  • LL.M (Public International Law) University of Toronto (Howland Prize for the Most Outstanding Performance on the LL.M)

Professional Memberships

  • Lincoln’s Inn
  • Defence Extradition Lawyers Association (DELF)

Public Access

Undertakes Public Access work

Attorney General Panel

Appointed to C panel


Katrina Makunova

Kathryn Howarth represented the London Borough of Merton in an inquest concerning the death of 17 years old Katrina Makunvoa, who was killed by a knife wound in an altercation with her ex-boyfriend at a block of flats in London.

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Sanchez v U.S.A. [2020] EWHC 508 (Admin) [2020] 2 WLUK 502 [2020] A.C.D. 51

Kathryn Howarth represented the Government of the USA before a Divisional Court comprised of Fulford LJ and Laing J.

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R v RTA [2019] UKSC 55

Supreme Court decision concerning the interpretation of article 1 of the UN Convention Against Torture. The appeal arose out of a domestic prosecution, under universal jurisdiction provisions, for offences of torture carried out during the Liberian civil war.

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R. v Lama (Kumar) [2014] EWCA Crim 1729 [2017] Q.B. 1171 [2017] 3 W.L.R. 469 [2014] 8 WLUK 111 [2017] 11 C.L. 59

Kathryn Howarth successfully represented the Crown and was led by Bobbie Cheema QC (now Mrs Justice Cheema-Grubb) before the Court of Appeal, in this important case which considered issues of public international law immunity.

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A Practical Guide to Extradition Law Post-Brexit

9th September 2021

Published on 6 September 2021 by the TGC Extradition Team.

Criminal Judicial Review (Hart)

9th March 2020

This is a comprehensive guide to challenging decisions of criminal courts and public bodies in the criminal justice system using judicial review. Written by a team of criminal and public law practitioners, it considers claims for judicial review arising in the criminal justice system, which now represent a distinct area of public law. Contributing Author (Chapter on EU Criminal Law).

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International Bar Association’s International Criminal Court Moot Court Manual

29th October 2014

This is a manual of Moot Court exercises written for the annual International Bar Association’s International Criminal Court Moot Court competition.


Kathryn Howarth represented the London Borough of Merton in an inquest concerning the death of 17 years old Katrina Makunova.

10th September 2021

Kathryn Howarth represented the London Borough of Merton in an inquest concerning the death of 17 years old Katrina Makunvoa, who was killed by a knife wound in an altercation with her ex-boyfriend at a block of flats in London.  There was significant media coverage of both the Crown Court trial and Inquest before the Senior Coroner for London Inner South.

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‘Brexit’ – What Does it Mean for Extradition Law?

14th January 2021

In a pre-recorded webinar that  will be streamed at 12:30pm on Friday 29th January 2021 Kathryn Howarth will take the participants through the new extradition arrangements contained in the EU-UK Trade and Cooperation Agreement (TCA) as well as the implementing legislation and the transitional provisions. The trade deal, struck at the eleventh hour on Christmas Eve, means that from 1st January 2021 the “Arrest Warrant” (AW) replaces the EAW as the mechanism for extradition between the UK and the EU member states. Please see link below for further details.

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Extradition after Brexit

20th November 2020

Kathryn Howarth and Daniel Sternberg examine the implications for policing following the U.K’s exit from the E.U, in particular the loss of access to the European Arrest Warrant.

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Kathryn Howarth appointed to Public International Law B Panel of Counsel

28th October 2020

TGC is delighted to announce that Kathryn Howarth has been appointed to the Attorney General’s Public International Law B Panel of Counsel as from 30 October 2020.

TGC Welcomes Kathryn Howarth to Chambers

9th March 2020

We are delighted to announce that Kathryn Howarth has accepted an invitation to join Temple Garden Chambers. Kathryn specialises in public international law, extradition and public law. She is a member of the Attorney General’s C Panel.

Privacy Notice

This document describes the information that Kathryn Howarth, in her professional capacity as a barrister, collects about data subjects, how it is used and shared, and the data subjects’ rights regarding it.

Thank you for choosing to instruct me in your case. I will need to collect and hold your personal information in order to advise and represent you. I might also need to collect and hold personal information of third parties.  I will take all possible steps to protect your personal information. I am determined to do nothing that would infringe your rights or undermine your trust. This Privacy Notice describes the information I collect and hold about you, how it is used and shared, and your rights regarding information.


I am registered with the Information Commissioner’s Office (ICO) as a Data Controller for the personal data that I hold and process as a barrister. My registered address is Temple Garden Chambers, 1 Harcourt Buildings, Temple EC4Y 9DA  and my registration number is ZA213605.


The vast majority of the information that I hold about you is provided to or gathered by your legal team in the course of your case and/or proceedings. Your solicitor will tell you why we need the information and how we will use it.


The General Data Protection Regulation (GDPR) requires all organisations that process personal data to have a Lawful Basis for doing so. The Lawful Bases identified in the GDPR are:

  • Consent of the data subject
  • Performance of a contract with the data subject or to take steps to enter into a contract
  • Compliance with a legal obligation
  • To protect the vital interests of a data subject or another person
  • Performance of a task carried out in the public interest or in the exercise of official authority vested in the controller
  • The legitimate interests of ourselves, or a third party, except where such interests are overridden by the interests, rights or freedoms of the data subject.


  •  Where the data subject is a client or in the service of the controller;
  • Transmission within a group of undertakings for internal administrative purposes;
  • Processing is necessary to ensure network and information security, including preventing unauthorised access;
  • Processing for direct marketing purposes, or to prevent fraud; and
  • Reporting possible criminal acts or threats to public security.

Our Lawful Basis can include any of the above as appropriate, but will generally be consent and/or performance or facilitation of the contract for the provision of legal services to you.

I have another Lawful Basis for processing your information (and that of any third party).  That is for the legitimate interests of my business as a barrister.


  • Provide legal advice and representation
  • Assist in training pupils and mini-pupils
  • Investigate and address your concerns
  • Communicate with you about news, updates and events
  • Investigate or address legal proceedings relating to your use of my services/products, or as otherwise allowed by applicable law
  • Make statutory returns as required by HMRC

I do not use automated decision-making in the processing of your personal data.

I collect and process both personal data and special categories of personal data as defined in the GDPR. This includes:


  • Name;
  • Email;
  • Phone number;
  • Address;
  • Payment or bank details;
  • Date of birth;
  • Location details;
  • Device IP address;
  • Financial information;
  • Medical Records;
  • Employment Records;
  • Social Security Records;
  • Criminal Records.


  • Instructing solicitors
  • Pupils or mini pupils, under my training
  • Opposing Counsel, for the purposes of resolving the case
  • My Chambers management and staff who provide administrative services
  • My regulator or legal advisors in the event of a dispute or other legal matter
  • Law enforcement officials, government authorities, or other third parties to meet our legal obligations
  • Any other party where I ask you and you consent to the sharing
  • Experts or witnesses involved in legal proceedings in respect of which you instruct me.


I do not transfer any personal data to third countries or international organisations.

I retain your personal data while you remain a client unless you ask me to delete it. My Retention and Disposal Policy (copy available on request) details how long I hold data for and how I dispose of it when it no longer needs to be held. I will delete or anonymise your information at your request unless:

  • There is an unresolved issue, such as claim or dispute or a reasonable prospect of such a claim or dispute;
  • I am legally required not to do so; or
  • There are overriding legitimate business interests, including but not limited to my obligation to keep records in case of future complaint or claim against me, fraud prevention and protecting customers’ safety and security.


The General Data Protection Regulation gives you specific rights around your personal data. For example, you have to be informed about the information I hold and what I use it for, you can ask for a copy of the personal information I hold about you, you can ask us to correct any inaccuracies with the personal data I hold, you can ask us to stop sending you direct mail, or emails, or in some circumstances ask us to stop processing your details. Finally, if I do something irregular or improper with your personal data you can seek compensation for any distress you are caused or loss you have incurred. You can find out more information from the ICO’s website and this is the organisation that you can complain to if you are unhappy with how I dealt with you.


You may request access to, correction of, or a copy of your information by contacting me at Temple Garden Chambers.


You may opt out of receiving emails and other messages from my Chambers by following the instructions in those messages.


Cookies are small text files that are stored on your browser or device by websites, apps, online media, and advertisements. The Chambers website may use cookies to:

  • Validate users;
  • Remember user preferences and settings;
  • Determine frequency of accessing our content;
  • Measure the effectiveness of advertising campaigns; and
  • Analyse site visits and trends.

I will occasionally update my Privacy Notice. When I make significant changes, I will publish the updated Notice on my Chambers website.