Since 2018, UK cannabis law has allowed certain medical uses under the Misuse...

https://delta-wiki.win/index.php/What_Does_Marketing_Authorisation_Mean_for_a_Cannabis_Medicine_in_the_UK%3F

Since 2018, UK cannabis law has allowed certain medical uses under the Misuse of Drugs Regulations 2001, not the 1971 Act. Specialist doctors can prescribe cannabis-based medicines like Sativex and Epidyolex, which remain Class B drugs otherwise