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 it, but only specialists can do so, and NHS support is usually limited to a few specific uses—like nabilone for nausea, a trial MS spasticity spray