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.



An excellent lawyer, who combines a great eye for detail with strategic and tactical vision for each case.

Legal 500 UK, 2021

Lesley Hannah, who is particularly prominent in the technology sector...

Legal 500 UK, 2021

A great lawyer.

Legal 500 UK, 2019

Lesly was described as having 'a bright future'.

Legal 500 UK, 2018