Since the 2018 law change, medical cannabis is legally available in the UK via...

https://fair-wiki.win/index.php/Does_NICE_Guidance_Affect_Private_Medical_Cannabis_Clinics%3F_Navigating_the_UK_Landscape

Since the 2018 law change, medical cannabis is legally available in the UK via specialist prescription. Many patients have questions about eligibility and costs. With NHS access limited, private clinics offer another route to explore.