UK cannabis laws were adjusted in 2018 through the Misuse of Drugs Regulations...

https://dlf-ne.org/is-cannabis-legal-in-the-uk-or-not-in-2026-clearing-up-the-confusion/

UK cannabis laws were adjusted in 2018 through the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971. This change made some cannabis-based medicines, like Sativex and Epidyolex, available on prescription but only from specialist doctors