Medical cannabis has been legal in the UK since 2018 when accessed through...

https://telegra.ph/If-I-have-a-prescription-can-I-still-fail-a-drug-test-in-competition-04-28

Medical cannabis has been legal in the UK since 2018 when accessed through specialist private clinics. Eligibility usually requires a chronic condition and proof that previous treatments were unsuccessful. It is a heavily regulated process