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

https://codysimpressiveperspectives.hexaforgey.com/posts/who-decides-uk-drug-classification-acmd-or-home-secretary-2

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