In 2018, the UK amended the Misuse of Drugs Regulations 2001—not the 1971...

https://www.random-bookmarks.win/in-2018-the-uk-updated-the-misuse-of-drugs-regulations-2001-to-allow

In 2018, the UK amended the Misuse of Drugs Regulations 2001—not the 1971 Act—to allow certain cannabis-based medicines like Sativex and Epidyolex by prescription. These remain Class B drugs, prescribed only by specialist doctors under strict rules