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Lesley Hannah

A qualified solicitor-advocate, Lesley focuses on - often complex and cross-border - competition damages litigation.


Lesley has extensive experience in managing multi-party claims and litigating against multiple defendants. She possesses considerable litigation experience in both the Competition Appeal Tribunal and the English High Court. Besides her expertise in dealing with follow on competition damages, she also manages abuse of dominance disputes, often against global corporates including tech giants.

She uses her expertise in European and Competition law together with her strong commercial acumen to focus and narrow the areas of dispute and to achieve compensation for businesses that have suffered losses as a result of illegal anticompetitive conduct.


Lesley advises and represents major corporate clients across a broad range of sectors and industries. She understands that litigation can be an unwelcome distraction for a business and makes sure that her clients achieve the best result with minimum risk and disruption.

Practice Areas

Competition Disputes

  • One of the lead partners in Air Cargo, bringing claims in the High Court on behalf of some 100 corporate groups against British Airways in relation to the worldwide cartel in air freight surcharges - one of the largest and lengthiest competition damages action brought in Europe to date. The claim settled after a complex 6-month mediation process in December 2018.
  • Bringing an abuse of dominance claim against Google linked to the EC’s investigation into Google Android and Google Shopping.

What Others Say

Legal 500

Ranked as a 'Next Generation Partner': ‘Lesley Hannah is an excellent lawyer, who combines a great eye for detail with strategic and tactical vision for each case.’ - Competition Litigation, 2021

'Lesley Hannah, who is particularly prominent in the technology sector...' - Competition Litigation, 2021

‘A great lawyer’ - Competition Litigation, 2019

Lesley was described as having ‘a bright future’. – Competition Litigation, 2018


Diploma in French Law, Université de Grenoble, France 
LLB (Hons) Law and French Law, University of Aberdeen
LLM in European Law, College of Europe, Bruges 

Bar Admissions

Solicitor of the Senior Courts of England and Wales
Admitted to the Brussels Bar, 2019 
Higher Rights (Civil Advocacy)

Affiliations & Memberships

Member - W@Competition organising committee 

News & Press

Lesley regularly provides comment to the specialist legal press - including Global Competition Review - and has been interviewed by BBC Business, with the most recent examples in the respective sections below.


Lesley regularly writes opinion pieces, accessible via the 'Articles' section below. In addition, she often contributes to the Hausfeld blog 'Perspectives' which can be found in the respective section below. 

Related News & Press