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

https://www.inter-bookmarks.win/since-2018-uk-cannabis-law-allows-specialist-doctors-to-prescribe-certain

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