In 2018, UK cannabis law changed through the Misuse of Drugs Regulations 2001,...

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

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