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

https://franciscosnewinsights.image-perth.org/how-do-i-know-i-m-dealing-with-a-regulated-pharmacy-and-not-something-sketchy

In the UK, getting a medical cannabis prescription starts with a specialist assessment at a private clinic or, rarely, through the NHS. If approved, medication is supplied by a regulated pharmacy to ensure safety and quality