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

https://foxtrot-wiki.win/index.php/What_Changed_with_Medical_Cannabis_in_the_UK_in_2018%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 and appropriate use