UK cannabis laws were adjusted in 2018 through the Misuse of Drugs Regulations...

https://marcoegvp005.fotosdefrases.com/what-are-the-offences-for-cannabis-under-the-misuse-of-drugs-act

UK cannabis laws were adjusted in 2018 through the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971. This change made some cannabis-based medicines, like Sativex and Epidyolex, available on prescription but only from specialist doctors