Jonathan Day


Jonathan is dual-qualified as a solicitor and trademark attorney. His background in brand protection enforcement and management coupled with IP and commercial advisory work, has led to his long-standing relationship with one of the world’s largest entertainment companies and other global companies including Western Digital, Allergan and Biogen Idec.

Jonathan regularly advises on complex trademark opposition cases and EU-wide brand clearance in a range of fields, from pharmaceuticals to anti-counterfeiting and enforcement strategies, and from brand co-existence, comparative advertising, and the IP aspects of major acquisitions and disposals. Recent work includes dispute management and business ventures, providing “quick, thorough and practical” advice (Managing IP), for one of the world’s leading entertainment companies. Jonathan has also been involved in the strategic management of a global pharmaceutical company’s European brand portfolio, encompassing eye care, obesity, neuroscience and aesthetic medicines.


“Extremely practical and knowledgeable”, Jonathan Day “can be relied upon to provide focused and tailored advice”.

WTR 1000, 2022


  • LLB (Hons)
  • Solicitor