In 2018, UK cannabis law changed through updates to the Misuse of Drugs...

https://ameliasnicedigest.swiftnestly.com/posts/why-is-the-licensed-vs-unlicensed-point-so-misunderstood-with-uk-medical-cannabis

In 2018, UK cannabis law changed through updates to the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971. This allowed specialist doctors to prescribe cannabis-based medicines like Sativex and Epidyolex under Schedule 2 rules