In 2018, UK cannabis law was updated through the Misuse of Drugs Regulations...

https://foxtrot-wiki.win/index.php/Is_It_Illegal_to_Import_Cannabis_into_the_UK_Even_for_Personal_Use%3F

In 2018, UK cannabis law was updated through the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971. This change allows specialist doctors to prescribe cannabis-based medicines like Sativex and Epidyolex under Schedule 2 rules