Since 2018, medical cannabis has been legal in the UK via specialist...

https://raymondnngc161.tearosediner.net/does-symptom-severity-matter-for-uk-medical-cannabis-eligibility

Since 2018, medical cannabis has been legal in the UK via specialist prescription, usually after other treatments fail. NHS access is rare, so most patients use private clinics. It’s a complex system, so do your research before booking an appointment.