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

https://telegra.ph/Has-Private-Medical-Cannabis-Prescribing-Affected-Clinical-Trials-in-the-UK-08-27

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