In the UK, medical cannabis prescriptions start with a specialist assessment at...

https://brooksssuperop-ed.tearosediner.net/is-medical-cannabis-actually-legal-in-the-uk-or-is-it-still-basically-banned-1

In the UK, medical cannabis prescriptions start with a specialist assessment at a private clinic or very rarely through the NHS. If suitable, medication is supplied by a regulated pharmacy to ensure safety and quality