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

https://touch-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. The National Institute for Health and Care Excellence (NICE) provides evidence-based guidance to support safe prescribing