In 2018, UK cannabis law was updated through changes to the Misuse of Drugs...
https://front-wiki.win/index.php/What_is_the_Simplest_Summary_of_UK_Cannabis_Law_After_2018%3F
In 2018, UK cannabis law was updated through changes to the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971