In 2018, UK cannabis law changed through updates to the Misuse of Drugs...

https://www.normalbookmarks.win/since-2018-uk-cannabis-law-has-changed-under-the-misuse-of-drugs-regulations

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