Since 2018, the UK has regulated medical cannabis as a prescription-only...

https://xeon-wiki.win/index.php/Why_Do_UK_Articles_Keep_Saying_%22Informational_Only%22_About_Medical_Cannabis%3F

Since 2018, the UK has regulated medical cannabis as a prescription-only medicine, available through specialist doctors. Treatment follows evidence-based guidance from NICE to ensure safe and appropriate use