In 2018, UK cannabis law changed through an update to the Misuse of Drugs...
https://high-wiki.win/index.php/Is_Cannabis_Legal_in_the_UK_or_Not_in_2026%3F_Clearing_up_the_Confusion
In 2018, UK cannabis law changed through an update to the Misuse of Drugs Regulations 2001—not the Misuse of Drugs Act 1971