O'Brien dominates Chester, Benvenuto Cellini and Amelia Earhart win trials

Aidan O'Brien turned Chester’s opening day into a statement of control, landing both the Boodles Chester Vase and the Weatherbys Cheshire Oaks with Ryan Moore aboard Benvenuto Cellini and Amelia Earhart. For all the noise around May festivals and early Derby talk, this was the kind of double that actually means something: two Classic trials, two short-priced winners, and another reminder that Ballydoyle rarely wastes a Chester trip.

Benvenuto Cellini did what a 2-9 favourite is supposed to do, and then some. He won the Chester Vase by confirming the authority behind him, giving O'Brien a record-extending 12th victory in the race and putting himself firmly on the Derby path. That matters because Chester has long been more than a quirky tight-turning track for Ballydoyle. It is where O'Brien has used the same script before, and Benvenuto Cellini now looks set to follow the route to Epsom that Lambourn used before last year’s Derby.

If the Vase was a test of certainty, Amelia Earhart was the race that changed the market. The filly won the Cheshire Oaks by two lengths, with I'm The One and A La Prochaine behind her, and the result immediately pushed her to the head of Betfred Oaks betting. Bookmakers made her around 3-1 to 5-1 after the race, and the move felt less like a panic reaction than a recognition that she had done more than simply outclass a modest field. O'Brien had already described her as a filly they “thought the world of,” and she backed that reputation with a performance that looked sharp, controlled and professional.

That is the key question now: Chester hype or Epsom substance? The answer, on this evidence, leans strongly toward substance. The Cheshire Oaks has produced the Oaks winner as the final prep three times in the last ten years, which is exactly why the race still matters as a serious pointer rather than a decorative Listed event. O'Brien’s record at Chester only strengthens that argument. His Cheshire Oaks win was his 10th in the race, and his Chester strike rate, a huge 63 percent, underlines how often Ballydoyle arrives here with the right horses for the job.

The scale of the meeting matched the significance of the results. Chester staged its three-day festival from May 6-8, 2026, and the Chester Cup drew a record 86 entries, but the story on day one belonged to the Classic trials. O'Brien did not just win both of them. He used them to set the tone for Epsom.