UK cannabis laws changed in 2018 with an update to the Misuse of Drugs...
https://station-wiki.win/index.php/What_Does_It_Mean_That_Cannabis_Remains_Controlled_in_the_UK%3F
UK cannabis laws changed in 2018 with an update to the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971