In the UK, getting a medical cannabis prescription starts with a specialist...

https://augustsniceblogs.timeforchangecounselling.com/can-i-bring-my-own-research-to-a-cannabis-specialist-appointment-or-is-that-annoying

In the UK, getting a medical cannabis prescription starts with a specialist assessment at a private or very rarely NHS clinic. If appropriate, a prescription is issued and filled through a regulated pharmacy to ensure safety and quality