Julian Hayes

He is pragmatic and client-friendly.” Chambers & Partners, 2022″

Chambers & Partners, 2022

Julian is a partner specialising in corporate and financial crime, computer misuse offences, surveillance and data protection law.

He advises individuals and corporates in relation to fraud and corruption investigations by the SFO, enforcement actions by the FCA (insider dealing and market abuse) and offences under the customs and excise legislation prosecuted by HMRC.

As well as expertise in relation to cybercrime, Julian also specialises in advising data controllers and others on the provisions of the Data Protection Act 2018 and GDPR (including breach reporting), and Communication Service Providers in relation to their obligations under the Investigatory Powers Act 2016 and its associated Codes of Conduct.

His work encompasses internal investigations, extradition (including Interpol Red Notices), ancillary matters such as judicial review, restraint and confiscation, mutual legal assistance, Norwich Pharmacal applications in the High Court and defending complaints against corporates for breaches of the OECD’s Guidelines for Multinational Enterprises.

Julian has acted for oil trading enterprises, multinational pharma companies, government organisations, leading social media platforms, telecommunications providers, international recording artists and other high profile individuals.

Following an undergraduate degree at the University of Kent, Julian completed post-graduate legal studies in Newcastle before training as a barrister at a leading criminal/regulatory chambers. He then worked as a regulator at the London Stock Exchange before moving to Australia where he spent several years undertaking high profile litigation at an international law firm. After returning to the UK and joining BCL, Julian became a partner in 2017.

Julian is an Executive Committee Member of the Fraud Lawyers Association (‘FLA’) and contributor to the FLA’s response to the Sentencing Council’s consultation on fraud, bribery and money laundering sentencing guidelines.

Julian speaks intermediate level German.


  • GIR’s Guide to Cyber Investigations:  Investigations in England & Wales – A Practitioner’s Perspective (2019)
  • Market Intelligence’s Privacy & Cybersecurity – United Kingdom (2019)
  • GIR’s Guide to Cyber Investigations: Investigations in England & Wales – A Practitioner’s Perspective (2nd ed.)

Professional Memberships:

  • Fraud Lawyers Association (Executive Committee Member)
  • European Criminal Bar Association
  • International Bar Association
  • The Law Society


  • Theatre and opera
  • German language and culture
  • Cycling & walking

What the directories have said:

“He is pragmatic and client-friendly.”

Chambers UK, 2022

“He is a brilliant lawyer.”

Chambers UK, 2022

“Julian is exceptionally bright and he will work tirelessly for his clients. Owing to his hard work, every aspect of the client’s case is presented in the best way it can be.

The Legal 500, 2021

“Julian Hayes will outwork anyone.”

The Legal 500, 2021

“It is always a pleasure to work with him, as he is very collegial and a very good lawyer. He has an enquiring mind and always figures out the client’s best interests and how to achieve them as optimally as possible. Julian Hayes is a specialist in the only recently newly regulated field of computer misuse offences, data protection, the regulation of artificial intelligence and online harms. He also has published several thought-leadership articles in relation to these topics.”

Chambers Insights, 2022

“Julian is very knowledgeable and a delight to work with. He knows the law inside out and then uses that knowledge to great effect for his clients, translating the black letter law into practical outcomes for his clients.”

Chambers Insights, 2022

“in data protection. The ICO are increasingly taking a criminal enforcement type role, and he definitely fills that gap in the market, advising on the overlap. He also takes a kind and friendly approach with clients and counsel – he is very personable.

He is very good on criminal procedure and is a very, very useful resource on data protection and cyber issues.”

Chambers Insights, 2022

“Julian has his finger on the pulse when it comes to data law developments. He is gentle but fiercely intelligent.”

The Legal 500, 2020

“…Julian Hayes, who is very competent, clever and also very nice to work with, because he is very reliable and always friendly. He has a keen interest in the area of data regulation and privacy.”

The Legal 500, 2020

Articles by Julian Hayes

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