Instructing him feels like turning up to a gun fight with an armoured tank

Legal 500 2026

One of the brightest legal minds of his generation, Jonathan is an absolute force in financial crime – fearless, meticulous and devastatingly effective on his feet

Legal 500 2026

a superb advocate. He is amazingly well prepared, exceptional in his applications of the procedures, drafting and being able to break very complicated and complex financial terms down

Chambers & Partners 2026

Unquestionably one of the best financial crime lawyers in the City…renowned for his razor-sharp instinct, ferocious intelligence and magnetic delivery. When he speaks, clients listen, and they love him for his excellent judgement, his tactical insights and his pitch-perfect advice

Legal 500 2025

A very elegant advocate who cuts to the chase but is sensitive to the clients' needs

Chambers & Partners 2026

a very impressive operator

Chambers & Partners 2026

Very charming and absolutely fearless…will challenge the court with real grace and charm

Chambers & Partners 2025

extremely clever; he is good at cutting through thousands of documents, getting the key points of the case and explaining complicated issues for clients, who love him

Chambers & Partners HNW 2025

a measured but impactful advocate

Chambers & Partners 2025

an incredible mind combined with a winning charm, overlaid with a wonderful sense of humour

Chambers & Partners 2025

utterly dependable, charming and clever. An absolute pleasure to work with

Chambers & Partners 2024

a consummate professional with great strategic awareness, no matter the complexities of the case. In court, he is a compelling advocate

Chambers & Partners 2024

rolls his sleeves up and gets into the detail, but also has a keen eye for long-term strategy. He has infallible judgement, and manages to maintain his good humour even in the most difficult cases

Chambers & Partners 2024
Contact Dean Brown Download CV (PDF)

Shortlisted for Corporate Crime Silk of the Year 2025

Particularly noted for his “supreme” judgment, “superb analytical skills” and heavy emphasis on teamwork, Jonathan garners accolades as an “elegant” and “charismatic” advocate. He is routinely instructed to represent professionals and corporate clients in high-profile, financial, and heavyweight criminal and regulatory matters. Whether at trial or providing strategic counsel during investigation, Jonathan is recognised as a “class act”, “incredibly intelligent”, “extremely industrious” and “a pleasure to work with”.

Ranked by: Chambers & Partners (Financial Crime, Financial Crime Corporate, Financial Crime High Net Worth), Legal 500, Who’s Who Legal: Business Crime and Best Lawyers in the United Kingdom.
Winner, Crime Junior of the Year 2016 (Chambers & Partners)

Jonathan has appeared in:

  • R v D (ongoing): representing CEO in overseas bribery & fraud trial
  • R v AC (2020-25): represented a former senior partner of Kennedys LLP, acquitted on all counts of an alleged multi-million pound fraud (leading two juniors: one civil, one criminal); SRA proceedings discontinued after representations made
  • R v M, B & O (2020-24): represented a former hedge fund director/owner facing charges of defrauding the Libyan Sovereign Wealth Fund across multiple jurisdictions
  • ENRC v Dechert LLP & SFO (Top 20 Cases 2022, The Lawyer): represented this major US law firm re multi-million pound, multi-jurisdictional civil fraud claim, co-defending with the SFO [2021] 7 WLUK 680
  • SFO v Barclays (winner – Most Important Court Case 2020, GIR): for first defendant, acquitted of all charges re Qatar multi-billion pound capital raise in 2008 [2019] 6 WLUK 873; [2020] Lloyd’s Rep. R.C. 331
  • SFO v D (2013-20): for D, ‘the power broker of the Middle East’, re alleged bribery of the Prime Minister of Bahrain [2014] 1 W.L.R. 1857, & related actions across multiple jurisdictions
  • SFO v Tesco: for first defendant (former CFO), acquitted of all charges re alleged fraud of over £300m [2019] 1WLUK 176
  • CPS v SB (2017): representing a consultant surgeon charged with ‘branding’ his initials onto a patient’s liver
  • SFO v FH Bertling Ltd: for a former director (2016-18)
  • SFO v Alstom: for a former director, acquitted of all charges re overseas corruption [2016] Q.B. 763
  • R v Robinson: for first defendant (former senior partner of an international firm of accountants), acquitted of all fraud charges before the Supreme Court of Gibraltar. Leading Authority on stay [2015] Gib LR 216 and prosecutorial misconduct [2015] Gib LR 410
  • R v Sivaraman [2015] 12 WLUK 619: represented gynaecologist in high profile private prosecution re legality of abortion (stayed, upheld by High Court with costs)
  • SFO v Evans (Celtic Mining): represented former CEO, successfully resisted High Court application for a voluntary bill of indictment [2015] 1 W.L.R. 3526, [2015] 1 W.L.R. 3595, [1025] Lloyd’s Rep, F.C. 496

and advised:

  • Re ZX Ltd (ongoing): advising regulated bond trading company in FCA enquiry (multi-jurisdictional)
  • Re Ultra Electronics Holdings Ltd (ongoing): advising an individual suspected of overseas corruption in SFO probe
  • Re DE (ongoing): advising individual under investigation re Post Office Horizon
  • Re AB: represented a former Glencore trader suspected of large-scale overseas corruption: no charges brought (2020-24)
  • A financing PLC facing NCA money laundering investigation and contempt proceedings: charges dropped (2023-24)
  • Rio Tinto Plc in 6 year investigation by the SFO, SEC and AFP into overseas corruption: SFO case closed without charge (2016-23)
  • A multinational, LSE-listed company facing an SFO probe: case closed without charge (2023-24)
  • A bank re money laundering issues (2023)
  • GPT Special Project Management Ltd re SFO investigation into bribery in Saudi Arabia (2016-20, i.e. pre guilty plea 2021)
  • Property tycoon Raymond Kwok, the only defendant to be acquitted in Hong Kong’s largest ever graft trial (2012-14)
  • The last editor of The News Of The World in his long running contempt proceedings before Parliament (2012-16)
  • A former high-ranking official at the Bank of England in relation to the SFO probe into LIBOR fixing

Education:

  • MA (First Class with Hons) University of Edinburgh; British Academy Scholar

Jonathan has appeared in:

  • R v AC (2024): representing a former senior partner of Kennedys LLP, acquitted on all counts of an alleged multi-million pound fraud (leading two juniors: one civil, one criminal);
  • R v M, B & O (2020-24): representing a former hedge fund director/owner facing charges of defrauding the Libyan Sovereign Wealth Fund across multiple jurisdictions
  • ENRC v Dechert LLP & SFO (Top 20 Cases 2022, The Lawyer): representing a major US law firm re multi-million pound civil fraud claim, co-defending with the SFO [2021] 7 WLUK 680;
  • SFO v Barclays (winner – Most Important Court Case 2020, GIR): for first defendant, acquitted of all charges re Qatar multi-billion pound capital raise in 2008 [2019] 6 WLUK 873; [2020] Lloyd’s Rep. R.C. 331;
  • SFO v Tesco: for first defendant (former CFO), acquitted of all charges re alleged fraud of over £300m [2019] 1WLUK 176;
  • SFO v FH Bertling Ltd: for a former director (2016-18)
  • SFO v Alstom: for a former director, acquitted of all charges re overseas corruption [2016] Q.B. 763;
  • R v Robinson: for first defendant (former senior partner of an international firm of accountants),, acquitted of all fraud charges before the Supreme Court of Gibraltar. Leading Authority on stay [2015] Gib LR 216 and prosecutorial misconduct [2015] Gib LR 410;
  • R v Sivaraman: High Court upheld stay (with costs) against high profile private prosecution of gynaecologist [2015] 12 WLUK 619;
  • SFO v Evans (Celtic Mining): representing former CEO, successfully resisted High Court application for a voluntary bill of indictment [2015] 1 W.L.R. 3526, [2015] 1 W.L.R. 3595, [1025] Lloyd’s Rep, F.C. 496;

and advised:

  • Re DE: advising individual under investigation re Post Office Horizon (ongoing)
  • Re CD: advising Director re SFO v Entain Plc investigation (ongoing)
  • Re BC: advising senior solicitor re Solicitors Regulation Authority investigation  (ongoing)
  • Re AB: representing a former Glencore trader suspected of large-scale overseas corruption: no charges brought (2020-24)
  • A financing PLC facing NCA money laundering investigation and contempt proceedings: charges dropped (2023-24)
  • Rio Tinto Plc in 6 year investigation by the SFO, SEC and AFP into overseas corruption: SFO case closed without charge (2016-23)
  • A multinational, LSE-listed company facing an SFO probe: case closed without charge (2023-24)
  • A bank re money laundering issues (2023)
  • Property tycoon Raymond Kwok, the only defendant to be acquitted in Hong Kong’s largest ever graft trial (2012-14);
  • The last editor of The News Of the World in his long running contempt proceedings before Parliament (2012-16);
  • A former high-ranking official at the Bank of England in relation to the SFO probe into LIBOR fixing.

Please contact Dean Brown

Jonathan Barnard KC

Dean Brown
Director of clerking

Portfolio Builder

Select the practice areas that you would like to download or add to the portfolio

Download    Add to portfolio   
Portfolio
Title Type CV Email

Remove All

Download


Click here to share this shortlist.
(It will expire after 30 days.)