Medical cannabis became legal in the UK in 2018. Runners often access it...

https://wiki-planet.win/index.php/Are_There_Follow-Up_Appointments_with_UK_Medical_Cannabis_Clinics%3F_A_Guide_for_Runners

Medical cannabis became legal in the UK in 2018. Runners often access it through private clinics for conditions where conventional treatments have failed. Eligibility depends on your medical history