Newmarket's racing industry is facing more questions after trainer Gerard Butler admitted using steroids on horses at his stables.
He says it was only done under advice from vets. He also says that more than 100 horses across the town's stables may have been given the same drug.
ITV News Anglia's Olivia Paterson reports.
A second Newmarket trainer has admitted giving anabolic steroids to his horses.
Gerard Butler follows Mahmood Al Zarooni who was banned for eight years last week for using the drugs on some of his horses.
Mr Butler says horses in his Egerton House Stables were only given the treatment under advice from vets.
It comes on the day drug testing got underway on the remaining 150 horses at Sheikh Mohammed's Moulton Paddocks stable where Al Zarooni had been in charge
The British Horseracing Authority is due to start full testing of every horse at the Godolphin stables in Newmarket today, following a doping scandal.
Mahmood al-Zarooni has admitted giving anabolic steroids to fifteen horses at the Godolphin stables, where he's been principal trainer since 2010. He's been banned from the sport for eight years.
Godolphin owner Sheikh Mohammed has locked down the Moulton Paddocks until the testing is undertaken.
Godolphin racing manager Simon Crisford says he "deeply regrets" the part he played in hiring Mahmood Al Zarooni.
Al Zarooni has been banned for eight years for administering anabolic steroids to 15 of his Newmarket based horses.
Talking to Channel 4 Racing Simon Crisford said a trainer runs the day-to-day management while a racing manager looks after the best interests of the owner.
He said that he couldn't be aware of every single bit of medication that Godolphin horses were getting.
Newmarket trainer Chris Wall gives his reaction to the 8 year ban imposed on trainer Mahmood al-Zarooni who has admitting doping 15 horses at the Godolphin stables in the town.
He told ITV News Anglia's Emma Baker that the racing industry in Newmarket can and will recover from the scandal.
Racehorse trainer Mahmood Al Zarooni has been disqualified for eight years after 11 of his horses tested positive for anabolic steroids.Read the full story ›
The Newmarket horseracing trainer Mahmood Al Zarooni has been banned from training horses for eight years after horses under his care at the Godolphin stables in Suffolk were tested positive for steroids.
Godolphin trainer Mahmood Al Zarooni has been disqualified for eight years by the British Horseracing Authority are admitting doping 15 of the operation's horses.
The racehorses involved up in the Newmarket doping scandal have been suspended from running for six months.
The British Horseracing Authority said the 15 horses in question have been suspended from racing from 9 April, the day they were tested until 9 October.
"The length of suspension reflects the period beyond which the BHA is confident that the horses in question can have derived no performance-related benefit from the administration of these prohibited substances."
The decision on the horses was made by the BHA itself, rather than the disciplinary panel hearing the inquiry into trainer Mahmood Al Zarooni.
Newmarket racehorse trainer Mahmood Al Zarooni is appearing at the British Horseracing Authority headquarters to face a disciplinary hearing over doping.
Al Zarooni was surrounded by a media scrum as he entered the building in central London with Simon Crisford, spokesman for the Godolphin operation, but did not speak to waiting reporters.
The trainer was charged after tests on 11 of his horses showed the presence of anabolic steroids.
He could lose his licence as a result of the hearing, in what is one of the most significant doping scandals in recent racing history.