The International Generic and Biosimilar medicines Association (IGBA), which represents global manufacturers of generic and biosimilar medicines, welcomes the UK MHRA publication of its updated guidance on the licensing of biosimilar products (10 May 2021). This publication marks a positive milestone in the evolution of evidence requirements for biosimilar approval through the removal of the default need for a comparative efficacy trial, instead basing approval on a comprehensive comparability exercise, including a comparative pharmacokinetics (PK) trial.