Since 2018, UK cannabis law has changed under the Misuse of Drugs Regulations...

https://www.cool-bookmarks.win/in-2018-uk-cannabis-laws-saw-a-specific-update-to-the-misuse-of-drugs

Since 2018, UK cannabis law has changed under the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971. Specialist doctors can now prescribe some cannabis-based medicines, like Sativex and Epidyolex, which are licensed for medical use