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

https://iris-wiki.win/index.php/Is_There_a_Clear_Line_Between_Medical_Cannabis_and_Recreational_Cannabis_in_the_UK%3F

Since 2018, the UK has regulated medical cannabis as a prescription-only medicine, available through specialist doctors. The move aims to ensure patient safety and consistent quality, guided by evidence-based recommendations from NICE