JUNIOR PROFILE
Jason Mansell

Jason Mansell

UK Bar 2026

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Ranked in 2 practice areas

About

Provided by QEB Hollis Whiteman

Practice Areas

Jason Mansell is a leading specialist in corporate and financial crime, with extensive experience guiding both corporates and individuals through the full lifecycle of criminal and related regulatory investigations. He is regularly instructed in matters involving market abuse, bribery and corruption, anti money laundering and the proceeds of crime, bringing considerable strategic insight to high stakes, multi dimensional cases. Jason’s reputation for calm and decisive advice, combined with his ability to navigate concurrent criminal and regulatory exposure, makes him a trusted adviser for clients facing some of the most sensitive and complex allegations in the business and financial arena.

Alongside his financial crime practice, Jason has exceptional regulatory expertise. He has acted in more than 100 FCA enforcement investigations and related proceedings before the RDC, Upper Tribunal and High Court, and has represented clients both for and against the Financial Reporting Council in disciplinary matters. Much of his work concludes without public action, reflecting his discreet and effective approach to risk management and resolution. Jason’s regulatory knowledge extends beyond financial services, and he is regularly instructed by professionals across a range of sectors seeking to manage serious regulatory challenges. His deep experience, sound judgement and ability to secure results in the most demanding circumstances mark him out as a genuine leader in this field.

Chambers Review

Provided by Chambers

UK Bar

Financial Services - London (Bar)

Band 1
Band 1

Individual Editorial

Jason Mansell is a highly regarded junior whose widely acknowledged expertise in financial crime is matched by his impressive efforts in dealing with cases concerning financial regulatory issues. He acts particularly for those whose activities have come to the attention of the regulatory bodies.

Financial Crime - London (Bar)

Band 2
Band 2

Individual Editorial

Jason Mansell's background as both a solicitor at a magic circle firm and a regulator at the Financial Services Authority means that he has great insight into how best to approach financial crime cases. He has recently advised a number of corporates on cross-border corruption issues and counselled financial institutions facing inquiries into rate manipulation. Commentators regard him as a go-to barrister for cases with criminal and regulatory crossover elements. His broad-based practice also includes notable strength in money laundering matters and insider dealing cases prosecuted by the Financial Conduct Authority.

Strengths

Provided by Chambers

  • He is very well respected in the field and very experienced. He is particularly good in securing fantastic settlement negotiations.

    Financial ServicesUK Bar
  • Jason's technical expertise is a game-changer on cases.

    Financial CrimeUK Bar

Ranked Barristers at QEB Hollis Whiteman (101)

All Circuits

London (Bar)

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