“A thorough litigator with immense
technical knowledge.”

Chambers & Partners

Simon Ayrton, Partner, specialises in IP litigation, arbitration and counselling. He advises clients on patent, breach of confidence, copyright, design, trade mark and passing off issues in a wide variety of industries.












WIPR Leaders 2017 iam 1000 - Recommended Individual 2015



Ranked In - Chambers UK 2016 - Leading IndividualRanked In - Chambers Global 2016 - Leading Individual   The Legal 500 UK - Recommended Lawyer 2015

Often drawing on his technical background, he has broad expertise advising clients in relation to IP and technology contract disputes in the pharmaceutical, chemical, electronics, software, entertainment, FMCG, publishing, confectionery, fashion and luxury goods sectors.


He handles cases in the UK Courts, UK IPO, EPO and at OHIM, and is regularly involved in the co-ordination of proceedings with parallel actions elsewhere in the world.


In addition to heavyweight technical dispute resolution, he has acted in a range of high profile anti-counterfeiting, parallel import and repackaging matters, which have included applications for interim injunctions, asset freezing orders and search orders. Simon has also been appointed by the Court on a number of occasions to supervise the execution of search orders by other firms of solicitors.


Simon has been a partner at Powell Gilbert since 2007. He frequently lectures on IP law and has been a tutor on the Oxford University Diploma in Intellectual Property Law and Practice (and its predecessor course) since 2000. Simon is also a member of the AIPPI, PTMG, INTA and EPLAW.


[T]he astute Simon Ayrton applies his mastery of technical subject matter to cases in a myriad of different fields. The popular lawyer is deemed by international sources to be "superb on patent and unfair competition matters".
IAM 1000: The World's Leading Patent Practitioners 2015


...someone “you definitely want on your side” for all matters across the IP spectrum.

Chambers and Partners 2014


“Simon Ayrton is technically excellent and very active in copyright and trade mark areas”.

Legal 500 2013


The "technically brilliant" Simon Ayrton "can turn his hand to patents in very different domains - his knowledge of even the minutae of cases is laudable".

IAM 1000: The World's Leading Patent Practitioners 2013


IP-rich companies "always want Simon Ayrton on their side in a fight". "Clever, thoughtful and with an eye for detail."

IAM 1000: The World's Leading Patent Practitioners 2012


Sources commend him for "thinking outside the box and providing commercially savvy solutions."

Chambers and Partners 2012


Interviewees agree that “he has a great eye for detail and is simply wonderful to work with; he’s charming, efficient, thoughtful and really looks after the client.”

Chambers and Partners Global, The Client’s Guide 2011


Simon Ayrton is renowned for his diverse IP practice, encompassing hard and soft IP matters

Chambers and Partners 2010


A thorough litigator with immense technical knowledge.

Chambers and Partners 2009


A ‘considered, cautious’ lawyer, clients say that if you want ‘an answer you know will have been thought about a great deal’, often with a creative spin, he’s your man. His practice and knowledge are broad.

Chambers and Partners 2008


Contact details

T +44 20 3040 8010
E simon.ayrton@powellgilbert.com



1993 Solicitor
2006 Solicitor Advocate



MA (Natural Sciences), Cambridge University
Diploma in Intellectual Property Law and Practice, Bristol University

Cases include
  • Research Corporation’s Patent (licence of right under an SPC)
  • IBM v Phoenix (trade mark infringement and passing off)
  • Rambus v Micron and Hynix (patents – memory chip technology)
  • Sony Computer Entertainment v Ball (copy protection circumvention devices)
  • Pharmacia v Merck (patents – COX 2 inhibitors)
  • Duracell v Round Imports (trade mark infringement)
  • Allergan v Pharmacia (patents – latanoprost)
  • Gillette v Corsair (trade mark infringement and passing off)
  • Unilever v Colgate (patents – soap packaging)
  • Aerotel v Telco (patentability of business methods – telecommunications)
  • Dr Reddy’s v Eli Lilly (patents - olanzapine)
  • Philips & others v Alba (patents - MPEG-2)
  • HTC v Apple (patents - smartphones)
  • Unwired Planet v Huawei (patents/FRAND – telecoms)