Medical cannabis became legal in the UK in 2018, accessible through specialist...

https://canvas.instructure.com/eportfolios/4205790/home/why-is-medical-cannabis-not-prescribed-casually-in-the-uk

Medical cannabis became legal in the UK in 2018, accessible through specialist private clinics once other treatments have been exhausted. For competitive runners, it is vital to know that THC remains strictly prohibited in-competition by WADA