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

https://erickcmpc682.theglensecret.com/why-is-schedule-1-described-as-having-no-legitimate-current-medical-use-in-the-uk

In 2018, UK cannabis law changed through an update to the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971