Since cannabis was rescheduled in 2018, NHS doctors can technically prescribe...

https://vergemagazine.co.uk/can-you-get-medical-cannabis-on-the-nhs-a-guide-to-the-uk-system/

Since cannabis was rescheduled in 2018, NHS doctors can technically prescribe medical cannabis—but only specialists can do so, and NHS use is mostly limited to specific cases like nabilone for nausea, the MS spasticity spray trial