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

https://dotimes.co.uk/medical-cannabis-in-the-uk-a-clear-guide-to-how-legal-prescriptions-work/

In the UK, medical cannabis prescriptions start with a specialist assessment to see if it's suitable for you. Private clinics offer these more often, as NHS prescriptions are rare. If prescribed, your medicine comes from a regulated pharmacy