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

https://www.bookmarkingvictor.win/since-2018-the-uk-has-allowed-medical-cannabis-to-be-prescribed-by-specialists-2

Since 2018, the UK has regulated medical cannabis as a prescription-only medicine available through specialist doctors. Guidance from NICE supports evidence-based prescribing to ensure patient safety and appropriate use