Since 2018, medical cannabis has been a legal option in the UK when prescribed...

https://high-wiki.win/index.php/Prescription_Monitoring_and_Medical_Cannabis:_What_You_Need_to_Know_in_2026

Since 2018, medical cannabis has been a legal option in the UK when prescribed by a specialist doctor. Rather than a one-size-fits-all approach, care is delivered through regulated clinics