Simon Llewellyn

Senior Associate

Simon is a solicitor in the Dispute Resolution team whose practice is focussed on patent litigation, particularly in the pharmaceutical and life sciences sector. He has assisted clients before the UK Patents Court, Court of Appeal and the Supreme Court in litigation concerning pharmaceutical products, product formulations, processes for the manufacture of pharmaceutical products and dosage regimens.

Simon specialises in assisting clients in multi-jurisdictional pharmaceutical patent litigation, often in circumstances where there are related proceedings pending before the European and US patent offices. He also provides infringement and validity opinions for clients in the life sciences sector.

Simon obtained a first class degree in chemistry from Imperial College London during which he spent time in the medicinal chemistry research group of a large multinational pharmaceutical company. Simon subsequently obtained a DPhil (PhD) in the field of organometallic chemistry from the University of Oxford, where he also worked as an industrially sponsored postdoctoral researcher in the field of carbon nanotubes.

Prior to joining the firm in 2018, Simon worked for over 9 years at two of London’s leading IP litigation practices.

Outside of work, Simon enjoys travelling, photography and spending time with his young family.


  • MSci Chemistry (Imperial College London)
  • DPhil Organometallic Chemistry (University of Oxford)
  • LLB (Legal Practice)
  • Diploma in IP Law & Practice (University of Oxford)
  • Higher Rights of Audience (Civil)
  • Solicitor

Key Cases

  • Generics v Yeda (validity/infringement of dosage regimen patent – High Court)
  • Actavis v Icos (validity of formulation patent – High Court)
  • Synthon v Teva (validity of process patent – Court of Appeal)
  • Servier v Apotex (damages under cross-undertaking; Supreme Court)
  • AstraZeneca v Krka  (damages under cross-undertaking – High Court)