In 2018, the UK amended the Misuse of Drugs Regulations 2001—not the 1971...

https://zandersmasterinsights.capitaljays.com/posts/015_sativex_vs_epidyolex__what_is_the_difference

In 2018, the UK amended the Misuse of Drugs Regulations 2001—not the 1971 Act—to allow specialist doctors to prescribe cannabis-based medicines like Sativex and Epidyolex