The UK medical cannabis supply chain involves producing unlicensed specials...

https://wiki-velo.win/index.php/Why_Are_Most_UK_Medical_Cannabis_Prescriptions_for_Unlicensed_Specials%3F

The UK medical cannabis supply chain involves producing unlicensed specials under strict MHRA oversight. Cultivation follows Good Agricultural and Collection Practice to ensure quality, while manufacturing meets Good Manufacturing Practice standards