The UK’s cannabis laws changed in 2018—not the Misuse of Drugs Act 1971 but the...
https://www.tntmagazine.com/leisure-entertainment/leisure/why-is-cannabis-still-illegal-in-the-uk-the-history-behind-medical-cannabis-law/
The UK’s cannabis laws changed in 2018—not the Misuse of Drugs Act 1971 but the Misuse of Drugs Regulations 2001—allowing specialist doctors to prescribe certain cannabis-based medicines like Sativex and Epidyolex under Schedule 2