Since 2018, the Misuse of Drugs Regulations 2001—not the 1971 Act—allow...

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

Since 2018, the Misuse of Drugs Regulations 2001—not the 1971 Act—allow specialist doctors in the UK to prescribe certain cannabis-based medicines, like Sativex and Epidyolex. However, cannabis itself remains a Class B drug, keeping most uses illegal