In the UK, medical cannabis for unlicensed specials follows strict MHRA...

https://mighty-wiki.win/index.php/Does_%22Unlicensed%22_Mean_the_MHRA_Has_Not_Checked_It_at_All%3F

In the UK, medical cannabis for unlicensed specials follows strict MHRA oversight to ensure patient safety. Producers must meet Good Manufacturing Practice (GMP) and Good Agricultural and Collection Practice (GACP) standards