“advises on litigation strategy, tactics and management, including coordination of multi-jurisdictional teams, as well as patent infringement risk and EPO opposition matters. He is highly regarded for his strategic thinking and composed approach, bringing clear and effective judgement to complex litigation”
IAM Patent 10002026
"Since he considers larger strategies and employs extremely astute tactical manoeuvres, his technical expertise as a litigator is exceptional. He has litigated in eight different nations during his multijurisdictional experience; thus, he is well-versed in international litigation issues"
Client Quote - Thomson Reuters' Stand-out Lawyers 2026
"Simon is an extremely excellent practitioner who is very sensible and collegiate."
Chamber and Partners 2025
"Simon is one of the leading patent litigators in the UK. He combines deep subject-matter knowledge with a highly commercial and strategic approach. He has been consistently trusted by clients with the very largest patent litigation under way in London."
Managing IP Stars 2024
"...standout partners. Commercial, concise, perceptive and client focused"
Legal 5002024
"provides comprehensive legal work, working with the client and co-counsel to understand all facets of the issues. Extremely clear and insightful"
Legal 5002024
"very strategic and always thinks two or more steps ahead"
Chambers and Partners2024
"a brilliant strategist in cross-border intellectual property cases. He is experienced in IP litigation, including trademark and copyright"
Chambers and Partners2024
"fights tenaciously to defend and enforce his clients' IP rights"
WTR2024
"fantastic - brilliant and very nice"
Chambers and Partners2024
"Excellent on all IP matters in the UK"
WTR2024
"Simon Ayrton is an insightful lawyer"
Chambers and Partners2023
"Simon is strategic, professional and a true expert in his field. He is extremely efficient, direct,
commercially minded and thinks outside the box. Simon is a joy to work with."
WTR 1000 2023
"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
"Give thoughtful, timely and insightful advice… are consummate professionals, are always willing to
listen and consider the opinions of others, and are a pleasure to work with."
IAM Patent 10002022
"efficient, smart and straight to the point"
World Trademark Review 2022
"a distinguished IP lawyer, hailed by peers as a go-to for patent infringement actions."
WWL 2022
"Thoughtful and gives timely and insightful advice. "Extremely knowledgeable, responsive and
thorough in his review of the assignments." "Simon Ayrton is a master tactician and really strong intellectually."
Chambers and Partners2022
"Simon Ayrton is an incredibly astute and considered litigator with a track record in the biggest
cases. ‘exceptional in the TMT area … acted for some of the largest players in this sector."
Legal 5002022
"…creative thinker with a strong understanding of a complicated and fluid area of law. The
combination of his business mindset, legal fundamentals and creative thinking result in high-quality,
focused counsel"
IAM Patent 10002022
"Simon Ayrton is clear, concise and focused and always gives advice speedily and specific to the
commercial realities of the situation"
Legal 5002021
"Simon Ayrton combines excellent legal intelligence and insight with commercial strengths in
planning and executing strategies in multi-jurisdictional disputes"
Legal 5002021
"He adopts a cerebral approach to litigation and is a very good tactician and co-ordinator of multi-jurisdictional disputes"
Chambers and Partners2020
"Professional, organised, calculated, and strategic, [he is] always mindful of business interests and
are exactly what you’d want in outside counsel"
IAM 1000: THe World's Leading Patent Practitioners2020
"He is one of the most intelligent and intellectual solicitors there is... He's on top of the whole case
and thinks two or three steps ahead"
Chambers and Partners2019
"heavyweight litigator with a talent for multi-jurisdictional briefs"
IAM 1000: The World's Leading Patent Practitioners2019
"high profile in the international patent litigation sphere and is recognised for his expertise in
resolving sophisticated technical disputes"
Who's Who Legal, Patents2019
