In the UK, medical cannabis prescriptions require a specialist assessment,...

https://blogfreely.net/gertonmhvf/why-isnt-a-medical-cannabis-prescription-automatic-even-if-i-ask-for-it

In the UK, medical cannabis prescriptions require a specialist assessment, usually through private clinics, as NHS prescriptions are very rare. If approved, your medication will come from a regulated pharmacy to ensure safety and quality