Since 2018, UK cannabis laws changed through updates to the Misuse of Drugs...

https://wiki-site.win/index.php/I_Thought_Cannabis_Was_Legal_in_the_UK_%E2%80%93_Why_Can_I_Still_Be_Arrested%3F

Since 2018, UK cannabis laws changed through updates to the Misuse of Drugs Regulations 2001, not the 1971 Act. This allows specialist doctors to prescribe cannabis-based medicines like Sativex and Epidyolex under Schedule 2 rules