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

https://bizzmarkblog.com/is-cannabis-decriminalised-anywhere-in-the-uk/

UK cannabis law changed in 2018 with an update to the Misuse of Drugs Regulations 2001—not the 1971 Act—allowing specialist doctors to prescribe cannabis-based medicines like Sativex and Epidyolex under Schedule 2