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

https://mag-wiki.win/index.php/How_Do_Medical_Cannabis_Prescriptions_Get_Dispensed_in_the_UK%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