Since 2018, medical cannabis has been legal in the UK via specialist private...

https://web-wiki.win/index.php/Can_I_Use_a_Medical_Cannabis_Card_to_Show_I%27m_Prescribed_in_the_UK%3F_A_Guide_for_Runners

Since 2018, medical cannabis has been legal in the UK via specialist private clinics. Eligibility requires a diagnosed chronic condition and evidence that prior treatments failed