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

https://johnnywyan573.lowescouponn.com/how-can-cannabis-be-class-b-but-schedule-2-at-the-same-time-uk-drug-law-explained

UK cannabis law changed in 2018 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