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