I agree it’s extremely vague that’s why I suggested contacting them instead.
Not knowing what laws will change on the medical frontier regarding medicinal cannabis requires more reading, if you can find any info that is. 
Edit: Cannabis stocks rally after Chuck Schumer leads drive for reforms that may end federal prohibition
https://www.marketwatch.com/story/cannabis-stocks-rally-after-chuck-schumer-leads-drive-for-reforms-that-will-end-federal-prohibition-11612292635
I’m not sure the British Government will take this route though.