In 2018, UK cannabis law was updated through changes to the Misuse of Drugs...

https://spark-wiki.win/index.php/Is_Medical_Cannabis_the_Same_as_Making_Cannabis_Legal_in_the_UK%3F

In 2018, UK cannabis law was updated through changes to the Misuse of Drugs Regulations 2001—not the 1971 Act—allowing specialist doctors to prescribe certain cannabis-based medicines like Sativex and Epidyolex under Schedule 2