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

https://www.primary-bookmarks.win/in-2018-the-uk-updated-the-misuse-of-drugs-regulations-2001-to-allow

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