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

https://wiki-net.win/index.php/How_Do_I_Bring_Up_Medical_Cannabis_at_a_Clinic_Without_Getting_Dismissed%3F

Since 2018, the UK has regulated medical cannabis as a prescription-only medicine, available through specialist doctors. Treatment follows evidence-based guidance from NICE to ensure safety and consistency