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Florence Iveson’s main practice areas are criminal and public law with a primary interest in extradition. She is described as “an exceptional advocate” in the Legal 500, and is ranked as a Tier 2 leading junior in international crime and extradition. She has received similar plaudits in Chambers and Partners, being described as an “outstanding” junior, “a persuasive advocate in her drafting as well as on her feet” and “always invested in the case and so committed, she goes above and beyond for the client.”


Florence is regularly instructed in complex matters including Part 2 cases, dealing with both technical and human rights issues.

Florence is currently acting for Julian Assange, led by Mark Summers QC and Edward Fitzgerald QC. She is also involved in a number of other part 2 requests at first instance, including representing Jeffrey Lendrum who resists extradition to Brazil for wildlife offences and  for the government of the United States in an extradition request relating to large-scale organised crime and money laundering.

Florence often appears before the Divisional Court, in her own right and lead by Queen’s Counsel. Florence has appeared without a leader in the Divisional Court against leading extradition silks, for example in the high profile case of Herba v Italy [2018] EWHC 3211 (Admin) and Mohammed v Portugal[2017] EWHC 3237 (Admin).

Florence has acted in many of the leading extradition appeals in recent years, including on fair trial rights in Poland (Lis v Poland [2019] EWHC 674 (Admin)), complex VAT carousel frauds (Malik v Germany [2018] EWHC 3479 (Admin), speciality (Kortas v Poland [2017] EWHC 1356 (Admin)) and section 12A (Puceviciene v Lithuania [2016] EWHC 1862 (Admin)).

Florence has a particular expertise in cases where extradition is resisted on the basis of poor prison conditions and has been junior counsel in many of the lead appeals in this area. Most recently she appeared before 3 judge Divisional Courts in Bartulis v Lithuania [2019] EWHC 3504 (Admin) and Szalai v Hungary [2019] EWHC 934 (Admin) (currently on appeal to the Supreme Court).  She has also had a large number of successes both at first instance and on appeal arguing Article 8 family life grounds (for example recently in Demirov v Bulgaria [2018] EWHC 3812 (Admin), DK v Belgium [2018] EWHC 2242 (Admin), Swiercz v Poland [2019] EWHC 1387 (Admin) and BM v Ireland (No. 1) [2020] EWHC 442 (Admin)).

 Criminal Law

Florence has undertaken a range of criminal work from the Magistrates’ Court to the Crown Court and the Court of Appeal.

Florence’s interest in international crime led to her working on a complex multi–jurisdictional case for the Serious Fraud Office involving possible international corporate corruption. Recently Florence was led by Alison McDonald in the Appeals Chamber of the International Criminal Court, instructed by Lawyers for Justice in Libya and REDRESS, as Amicus Curiae in Saif Al-Islam Gaddafi’s admissibility challenge.

Florence also has an interest in consumer law, having acted for Trading Standards Authorities many times, spoken at the annual TSI conference and also provided training for Trading Standards Officers

Public Law

Florence has experience of education appeals and has also undertaken a wide range of immigration matters. Florence advises on unlawful detention claims and has been appointed to the Attorney General’s London C Panel.

Prison Law

Florence has had an interest in prison law since setting up the Vocalise Prison Debate programme in 2010, which sees law students teaching Parliamentary style debating to prison inmates across London. Florence now appears in parole board matters.

Privacy Notice

Florence is committed to protecting and respecting your privacy. In order to provide legal services to her clients, including advice and representation services, she needs to collect and hold personal data. This includes her client’s personal data and the personal data of others who feature in the matters in respect of which she is instructed. To view Florence’s privacy notice in full, please see here.

Florence is regulated by the Bar Standards Board and accepts instructions under Standard Contractual Terms. To find out more information on this and the way we work at Matrix, including our fee transparency statement, please see our see our service standards.


“A forceful advocate who really cares about her clients,” “she is a persuasive and passionate performer.” “She possesses strong technical knowledge and is good on esoteric points of law. Florence is exceptional at dealing with emotive cases.”

Chambers & Partners 2021

An “outstanding” junior who prosecutes and defends complex extradition cases.

“A fantastic lawyer who is brilliant with clients and a persuasive advocate in her drafting as well as on her feet. She is a pleasure to work with a clearly a rising star among extradition lawyers.”

“Clever, hard-working and someone who can spot the weaknesses in a case, she rolls her sleeves up and gets completely stuck in.”

“Her levels of preparation and effort at all stages of proceedings are incomparable.”

Recent work: Acted in DK v Belgium, an extradition case regarding an individual wanted for burglaries.

Chambers & Partners, 2020 

“Immensely hardworking and driven; clients love her.”

Legal 500, 2020

An “excellent” junior who prosecutes and defends complex extradition cases. Her developing practice includes cases involving prison conditions. Interviewees praise her client care and note she has expertise in handling vulnerable clients.

“Energetic, knowledgeable and someone who cares deeply about her cases.” “Always invested in the case and so committed, she goes above and beyond for the client.”

Recent work: Appeared in Bulgaria v Adanali, successfully acting for an individual facing a EAW relating to a conviction for smuggling antiquities.

Chambers & Partners, 2019

An exceptional advocate – her work is always praised by lay clients

Legal 500, 2018

Instructed by governments and requested persons.

Legal 500 2017