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

https://www.tool-bookmarks.win/in-2018-uk-cannabis-laws-changed-through-updates-to-the-misuse-of-drugs

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