Godolphin trainer Mahmood Al Zarooni could lose his training licence when he faces a disciplinary panel of the British Horseracing Authority tomorrow.
Yesterday, he admitted making "a catastrophic mistake" after 11 of his horses were found to have contained traces of anabolic steroids.
The 37-year-old has officially been charged with rule breaches related to prohibited substances, duty to keep medication records, and conduct prejudicial to racing.
The hearing will be held at 2.30pm at BHA headquarters in London.
More top news
Barack Obama's greatest struggle on climate change could be convincing the conspiracy theorists at home that it's not a hoax.
Rare footprints of dinosaurs from 170 million years ago have been discovered on the Isle of Skye.
After a remarkably mild November, a notably mild start to the new month.