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

https://future-wiki.win/index.php/Why_is_UK_Medical_Cannabis_Prescribing_So_Cautious%3F

Since 2018, the UK has regulated medical cannabis as a prescription-only medicine, available through specialist doctors. Guidance from the National Institute for Health and Care Excellence (NICE) supports evidence-based prescribing