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

https://averyssuperthoughts.theburnward.com/what-does-regulated-medicine-mean-in-real-life-for-cannabis-patients

Since 2018, the UK has regulated medical cannabis as a prescription-only medicine, available through specialist doctors. Prescribing follows evidence-based guidelines, including those from NICE, ensuring medicines meet safety and quality standards