Mark has over 20 years' experience of complex high value commercial and cross-border fraud litigation, acting for FTSE100 companies, banks, hedge funds and ultra-high net worth individuals. Mark is familiar with obtaining, executing and challenging injunctions, worldwide freezing orders and search and seizure orders. He has acted for and against parties based in the Middle East, Russia and the former CIS countries, and most of his cases have an international element.

Mark also has expertise and experience in product safety and liability cases, having played a role in the defence of many of the significant Group Litigation Orders of the last 10 years, acting for defendants in retail, pharma, banking and public sector.

Mark worked as a lead associate on six of The Lawyer's "top cases of the year" (2010 to 2020) and is recommended in Legal 500 for Commercial Litigation, Civil Fraud and Product Liability Litigation..

Mark is known as an expert in the field of electronic disclosure and document review and the related practical and legal issues (including privilege, cross-border data protection rules and privacy regulations).


  • Advising the Department for Business and Trade in relation to fully compensating the sub-postmaster harmed by Post Office Horizon scandal who were party to the Bates v Post Office Limited Group Litigation. 
  • Acting for Unitel SA in its Commercial Court Claims against Isabel Dos Santos, the daughter of the former president of Angola, obtaining a Worldwide Freezing Order for $580 million.([2023] EWHC 3231 (Comm) 
  • Representing over 70 Authorised Dealers in the NOX Diesel Emissions GLO brought by over 100,000 claimants in relation to BMW vehicles.
  • Acting for GlaxoSmithKline in its successful defence of a large product liability group action in relation its antidepressant, Seroxat
  • Acting for Dixons Carphone plc in its dispute with McAfee which involved an interim injunction and a claim for damages in excess of $30 million.

Recommended in Legal 500 UK since 2016 for civil fraud, commercial litigation and product liability.

"Next Generation Partner" 
Legal 500 UK (2019) – Product Liability: Defendant

"A lawyer's lawyer and great to work with" 
Legal 500 UK (2018)

"class act"
Legal 500 UK (2017) – Product Liability: Defendant

"seasoned fraud litigator"
Legal 500 UK (2017) – Fraud: Civil

"'Bright, hardworking and committed' Legal Director Mark Chesher is recommended"
Legal 500 UK (2016)