In 2018, UK cannabis law changed through updates to the Misuse of Drugs...

https://cristiansuniquejournals.cloudhinter.com/posts/why-does-uk-medical-cannabis-rely-on-private-clinics-so-much

In 2018, UK cannabis law changed through updates to the Misuse of Drugs Regulations 2001, not the Misuse of Drugs Act 1971. Since then, specialist doctors can prescribe cannabis-based medicines listed as Schedule 2 substances