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

https://becketteulj000.cavandoragh.org/what-does-marketing-authorisation-mean-for-a-cannabis-medicine-in-the-uk

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