Medical cannabis has been legal in the UK since November 2018, though it is...

https://highstylife.com/can-i-qualify-for-medical-cannabis-if-i-had-bad-side-effects-from-meds/

Medical cannabis has been legal in the UK since November 2018, though it is rarely a first-line treatment. It must be prescribed by a specialist consultant, usually only after other licensed therapies have failed to manage your symptoms effectively