Extradition and Mutual Legal Assistance

6KBW College Hill has one of the largest extradition teams at the Bar, with individual members consistently recognised for their excellence across the directories. We are ranked in Band 1 for Extradition by Chambers UK and have a “wealth of extradition specialists across levels of seniority” (Legal 500, 2026).

We act for requested persons and requesting states in both Part 1and Part 2 extradition proceedings and our barristers appear at every stage of contested extradition proceedings. We provide a bespoke service from pre-arrest advice and the first hearing at Westminster Magistrates’ Court through to the High Court, the Supreme Court and the European Court of Human Rights.

We provide advice to government departments and prosecuting agencies, and in-house training and seminars for prosecutors and solicitors. Our barristers have provided expert evidence on UK extradition law in foreign legal proceedings and have given evidence before Parliamentary Select Committees. In 2011, David Perry KC was appointed by the Home Secretary to conduct a comprehensive review of the United Kingdom’s Extradition Arrangements.

Barristers at 6KBW College Hill regularly publish articles on extradition in the Criminal Law Review and have written extensively about extradition.

• Pre-arrest legal and strategic advice
• Advice and representation at all stages of Part 1 and Part 2 contested extradition proceedings
• Advice on related proceedings and issues (including asylum, asset freezing and prisoner transfer)
• Applications to the European Court of Human Rights, including applications for interim measures
• Interpol Red Notices

Members of Chambers advise and represent individuals, corporations, foreign governments and prosecuting agencies in relation to mutual legal assistance requests made to and from the UK.

In addition to ongoing advisory work and litigation, we have participated in the negotiation and implementation of international MLA frameworks. Our barristers worked with government officials across the common law world the revise the “Harare Scheme” for mutual legal assistance within the Commonwealth and have trained foreign prosecutors in mutual legal assistance. In addition, Victoria Ailes authored Part III (Mutual Legal Assistance) of the Extradition and Mutual Legal Assistance Handbook (Oxford University Press).

6KBW College Hill is ranked Band 1 for Extradition by Chambers UK

“One of the very best criminal defence sets in London” — The Legal 500

“6KBW is one of the leading sets for extradition, with many members specialising” — The Legal 500

“The clerks are the best in London … Richard Summerscales and Mark Essex are hugely experienced” — The Legal 500

• Coelho v SSHD [2026] EWCA Civ 1219
• Weiss & Anor v Regional Court in Gliwice, Poland [2025] EWHC 2948 (Admin)
• Alchaster I and II, cases C-202/24 and C-743/24
• Sanchez-Sanchez v UK Grand Chamber judgment of 3 November 2022
• Oprea v Law Court of Arad, Romania Bucharest Regional Court, Romania [2025] 4 WLR 85
• Weinzierl v United States [2025] EWHC 391 (Admin)
• Hamilton v United States [2023] EWHC 2893 (Admin)
• Beaumont v Crown Prosecution Service [2022] 1 WLR 3700
• Zabolotnyi v The Mateszalka District Court, Hungary [2021] UKSC 14; [2021] 1 WLR 2569
• Hafeez v United States [2020] 1 WLR 1296
• Schmatko v the Russian Federation [2018] EWHC 3534
• Korcala v Poland [2017] 1 WLR 1543
• Puceviciene v Lithuania [2016] 1 WLR 4937
• R (Ismail) v Secretary of State for the Home Department [2016] UKSC 37, [2016] 1 WLR 2814
• United States v Giese [2016] 4 WLR 10
• Poland v Celinski [2016] 1 WLR 551
• Pomiechowski v District Court of Legunica, Poland [2012] UKSC 20, [2012] 1 WLR 1604
• R (HH) v City of Westminster Magistrates’ Court [2012] UKSC 25, [2013] 1 AC 338
• Norris v United States [2010] UKSC 487, [2010] 2 AC 487
• Gomes v Trinidad and Tobago [2009] UKHL 21, [2009] 1 WLR 1038

To discuss instructing a member of the extradition team, please contact our clerks on +44 (0)20 3301 0910 or clerks@6kbw.com.