In the UK, medical cannabis prescriptions must be made by a specialist...

https://blogfreely.net/gertonmhvf/h1-b-if-i-have-a-long-term-condition-how-do-specialists-decide-if-cannabis

In the UK, medical cannabis prescriptions must be made by a specialist following a thorough assessment. Most patients access treatment through private clinics as NHS prescriptions are rare. Medicines are supplied by regulated pharmacies to ensure safety