In 2018, UK cannabis law changed through the Misuse of Drugs Regulations 2001,...

https://wiki-legion.win/index.php/Can_the_Home_Secretary_Change_Cannabis_Classification_Without_Parliament%3F

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