The UK’s cannabis laws changed in 2018 through an update to the Misuse of Drugs...

https://www.bookmark-xray.win/since-2018-uk-law-permits-specialist-doctors-to-prescribe-cannabis-based

The UK’s cannabis laws changed in 2018 through an update to the Misuse of Drugs Regulations 2001—not the Misuse of Drugs Act 1971. Since then, specialist doctors can prescribe cannabis medicines classified as Schedule 2, like Sativex and Epidyolex