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.

My work

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.

What my clients say

“Very quick to grasp the issues at hand, no matter how complex”

“Produces high quality work”

“Hardworking, dedicated and has a real attention to detail”

 “His high service levels match his reliability”

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