UK cannabis law changed in 2018 with an update to the Misuse of Drugs...

https://www.click-bookmark.win/in-2018-the-uk-s-misuse-of-drugs-regulations-2001-were-updated-to-allow

UK cannabis law changed in 2018 with an update to the Misuse of Drugs Regulations 2001, not the older 1971 Act. This allowed specialist doctors to prescribe cannabis-based medicines listed under Schedule 2