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

https://www.pure-bookmark.win/since-2018-uk-cannabis-laws-have-shifted-through-changes-to-the-misuse-of

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