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

https://averyssuperthoughts.theburnward.com/is-medical-cannabis-in-the-uk-treated-like-a-one-off-purchase-or-ongoing-care

In the UK, medical cannabis prescriptions start with a specialist assessment—often at private clinics since NHS prescriptions are rare. If approved, meds come from regulated pharmacies ensuring quality and safety