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
Wet and windy weather will spread in from the west, turning to snow in places, especially later over the hills.
McDonald's in Japan will resume serving large portions of French fries in January after a labour dispute in the US disrupted supply.
More than four in 10 cases of cancer in the UK could be avoided if people made changes to their lifestyle, Cancer Research says.