Since 2018, UK cannabis law has changed under the Misuse of Drugs Regulations...

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

Since 2018, UK cannabis law has changed under the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971. Specialist doctors can now prescribe some cannabis-based medicines, like Sativex and Epidyolex, which are licensed for medical use