Since 2018, the UK has regulated medical cannabis as a prescription-only...

https://andreimgc701.cavandoragh.org/can-my-gp-prescribe-medical-cannabis-in-the-uk

Since 2018, the UK has regulated medical cannabis as a prescription-only medicine, available through specialist doctors. The National Institute for Health and Care Excellence (NICE) provides evidence-based guidance to support safe prescribing