In 2018, UK cannabis law was updated through the Misuse of Drugs Regulations...

https://www.slideserve.com/eogernrhbu/is-there-a-review-of-the-2018-medical-cannabis-change-happening-now

In 2018, UK cannabis law was updated through the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971. This change allowed specialist doctors to prescribe cannabis-based medicines like Sativex and Epidyolex under Schedule 2