Contador, who won his third tour this year, was tested during the second rest day of the race and the second B test had confirmed the presence of clenbuterol
, the UCI said in a statement.
The UCI said in a statement that the amount of clenbuterol
detected in Contador's urine on July 21 was 400 times smaller than the World Anti-Doping Agency are required to detect and are promising "further scientific investigation" before taking action.
The UCI said the amount of clenbuterol
in Contador's sample was "400 time(s) less than what the antidoping laboratories accredited by WADA must be able to detect.
All Ward's Ascot runners were drug tested and the results proved negative but, while his record of drug-related suspensions and fines in the US provokes questions over the BHA's reaction to prolonged clenbuterol
use in other jurisdictions, Dr Tim Morris, director of equine science and welfare, insists there should be no rush to judgement.
Charlton had been treating Three Valleys for mucus in the lungs in the run-up to the race but the Beckhampton trainer said: 'He was withdrawn from veterinary treatment nine days before the guidelines (veterinary and Jockey Club), which suggest that six-and-a-half days should be a safe period for clenbuterol
,' Trainers concerned over the guidelines have the chance to air their views at pre-arranged meetings with Jockey Club officials shortly.
We dared not eat pork when we came out of our training camp for the tournament because we were afraid of clenbuterol
Contador, champion in 2007, 2009 and 2010, maintains his positive test for clenbuterol
was a result of contaminated meat and protests his innocence, but his participation in the sport's biggest race is controversial.
THE saga over Alberto Contador's positive test for clenbuterol
is set to rumble on after the International Cycling Union (UCI) yesterday confirmed they would take the case to the Court of Arbitration for Sport.
Contador was cleared on Tuesday by the Royal Spanish Cycling Federation (RFEC) after testing positive for the banned substance Clenbuterol
at last year's Tour de France.
The 28-year-old Spaniard reported an adverse finding for Clenbuterol
on July 21 last year, attributing the result on the second rest day to contaminated meat and maintaining his innocence throughout.
Beck, ranked 104th in the world, returned to the sport in 2007 after serving a two-year drugs ban following a positive test for clenbuterol
in the 2005 Davis Cup, having risen into the world top 40 earlier in his career.
The news comes after it was confirmed traces of clenbuterol
had been found in samples taken from Tour de France champion Alberto Contador.