The 28-year-old lost his boxing licence last October, a day after he vacated his IBO, WBA and WBO heavyweight titles citing depression.
However, the Manchester-born fighter had already failed a drugs test in the United States for cocaine and been charged with the use of a prohibited substance by UK Anti-Doping (UKAD).
With Fury now back in training, UKAD is his most serious opponent, as his National Anti-Doping Panel was postponed earlier this month, with no date set for its resumption.
