Lennart Poulsen


Lennart combines a thriving international practice – with many years of experience on cases before different international tribunals – with a maturing Crown Court practice in which he is highly regarded by solicitors and lay clients.

He also has a strong commercial background at Clifford Chance and a leading consultancy firm, which has led him to develop a commercial practice.

Lennart is currently instructed as junior counsel for one of the Core Participants in the Grenfell Tower Public Inquiry.

Background and Expertise

Lennart is a highly experienced international lawyer who is frequently instructed, as a led junior, on projects advising governments and international organisations. Last year, he was invited to be a keynote speaker at an International Bar Assocation (IBA) conference in London.

He offers legal advice and representation for governments, individuals or entities upon whom UK or international (including UN or EU) sanctions have been imposed.

Before joining 9 Bedford Row, Lennart spent over two-and-a-half years as a full-time legal assistant on the defence team in the case of Prosecutor v Stojan Zupljanin before the International Criminal Tribunal for the former Yugoslavia.

Lennart is regularly instructed in a wide range of serious criminal matters. He is an excellent advocate, praised for his ability to analyse large volumes of complex information and present this clearly.

Lennart has also developed a commercial practice – assisted by his previous experience as a solicitor at Clifford Chance and as a management consultant for a leading international consultancy firm in London.

Lennart frequently advises corporate clients and other entities both in the UK and abroad on data protection and privacy, particularly in respect of compliance with the GDPR. This includes:

  • Advising on specific responsibilities under GDPR
  • Compliance checks
  • Data protection policies
  • Drafting controller-processor contracts
  • Contracts involving third party processors outside the EU
  • Contracts involving third party processors in jurisdictions without an adequate level of data protection as determined by the EU Commission
  • Cross-border transfer of data
  • Security and privacy controls
  • Data protection impact assessments
  • Advice on breach and possible supervisory authority investigations
  • Advice and representation before the ICO or other supervisory authority

Recent work has involved advising a corporate client in the Cayman Islands and drafting agreements involving the transfer of data to a jurisdiction without an adequate level of data protection.

International Cases

State Lawsuit (Litigation) Authority of Egypt

Part of small team led by Steven Kay QC, commissioned by the State Lawsuit (Litigation) Authority of Egypt to provide a series of reports on the Muslim Brotherhood.

See egyptevidence.com.


Co-drafted a preliminary report for the UN Independent Commission of Inquiry (COI) on the 2014 Gaza Conflict, on behalf of a Palestinian human rights group – in respect of war crimes allegedly committed by Israel during its military offensive against Gaza during the summer of 2014.

Read more International Cases

Notable cases

Grenfell Tower Public Inquiry

Currently instructed as junior counsel for one of the Core Participants in the Grenfell Tower Public Inquiry.

Rawlinson & Hunter, Vincent Tchenguiz and others v Grant Thornton and others, 2015
Complex commercial fraud claim for damages amounting to £2.2bn (led by Steven Kay QC).
R v A, 2017

Defended in drugs case involving large-scale police sting operation.

See article in the Oxford Times.

Read more Notable cases

Other Activities and Interests

  • Guest speaker at international conferences
  • Recent keynote speaker at the IBA–European Law Students’ Association conference on the history of international tribunals.
  • Contributor to legal articles and blogs on international criminal law and sanctions.


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PROFILE: Lennart Poulsen

Year called




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Confiscation / POCA

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Financial Crime

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Fraud, Bribery & Corruption

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Serious Crime

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Sexual offences

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Inquests / public inquiries


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Confiscation / POCA

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Financial Crime

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Fraud, Bribery & Corruption

Financial and Corporate law

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Civil Fraud

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Corporate Offences

Road Traffic

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Road traffic

Direct access



020 7489 2727


LLM (Distinction), University of Warwick

BVC (Very Competent), Inns of Court School of Law (City University)

GDL (Commendation)

BSc (Hons)


Criminal Bar Association, IBA


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