Josh Griffiths, who has represented GB at the World Athletics Championships, received a three-month ban by the Athletics Integrity Unit earlier this year.
This was for testing positive for the substance Benzoylecgonine โ a Metabolite of Cocaine โ following his run of 2:18:01 for fourth place at the Belfast Marathon on May 3.
Both his A and B sample contained Benzoylecgonine.
Griffiths, a 2:11:28 marathon runner, stated that he "had never knowingly ingested Cocaine and was not aware of Cocaine having been used by anyone close to him".
The AIU accepted Griffiths' explanation that "any ingestion must have occurred out-of-competition and been unrelated to sport performance".
Griffiths admitted the violation and he served his ban from June 19 2026 to September 18 2026. His results on and since May 3 have been DQ'd.