Godolphin trainer Mahmood Al Zarooni has been suspended for eight years and the 15 horses that tested positive for one of two anabolic steroids have been suspended from racing for six months.

One of the horses affected is Certify, who was a leading contender for the One Thousand Guineas (Eng-I) before she tested positive.

Al Zarooni was sanctioned following a hearing of the British Horseracing Authority’s (BHA) Disciplinary Panel that met April 25.

“We believe that the eight-year disqualification issued to Mahmood Al Zarooni by the disciplinary panel, together with the six month racing restriction placed on the horses in question by the BHA, will serve to reassure the public, and the sport’s participants, that use of performance-enhancing substances in British Racing will not be tolerated and that the sport has in place a robust and effective anti-doping and medication control program,” said Paul Bittar, the BHA’s chief executive