The UK medical cannabis supply chain involves strict oversight by the MHRA to...

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

The UK medical cannabis supply chain involves strict oversight by the MHRA to ensure patient safety. Products often come as unlicensed specials, made following Good Manufacturing Practice and Good Agricultural and Collection Practice standards