UK cannabis law changed in 2018 through an update to the Misuse of Drugs...

https://www.jelly-bookmarks.win/in-2018-uk-law-changed-how-cannabis-is-regulated-specifically-the-misuse-of

UK cannabis law changed in 2018 through an update 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