Since cannabis was rescheduled in 2018, NHS doctors can technically prescribe...
https://highstylife.com/how-do-i-find-a-legit-medical-cannabis-clinic-in-the-uk/
Since cannabis was rescheduled in 2018, NHS doctors can technically prescribe medical cannabis—but only specialists may do so, and only for a few approved uses like nabilone for nausea, a spasticity spray trial