Since cannabis was rescheduled in 2018, NHS prescribing is technically allowed...

https://www.bookmarking-online.win/since-the-2018-rescheduling-nhs-doctors-can-technically-prescribe-medical

Since cannabis was rescheduled in 2018, NHS prescribing is technically allowed but remains rare, limited to specialist doctors and only for a few conditions—like nabilone for nausea, MS spasticity spray trials