Queen’s horse tests positive for morphine

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A racehorse owned by the Queen has tested positive for morphine, a prohibited substance, Buckingham Palace has announced.

Estimate, which won the Gold Cup at Royal Ascot in 2013 and came second in the same race this year, is a five-year-old filly trained by Sir Michael Stoute.

Initial indications are that the positive test resulted from the consumption of a contaminated feed product, the Queen’s racing advisor said.

Although morphine is not prohibited during training, it is banned on race days.

The Queen, who cheered the horse on to success at Royal Ascot last year, has been informed of the development.

Estimate made sporting history for the Queen when she became the first reigning monarch to win Royal Ascot’s Gold Cup.

With a clap of her hands and a beaming smile, she celebrated the moment the horse finished first.