Today is Trials Day at Chester. The Weatherbys Cheshire Oaks and the Boodles Chester Vase run this afternoon. Last year, for the first time in Chester's history, the winners of both races went on to win at Epsom in the same year. Minnie Hauk won the Cheshire Oaks and then the Epsom, Irish and Yorkshire Oaks. Lambourn won the Chester Vase and then the Epsom Derby. What happens at Chester today will reshape the ante-post markets for both Classics within hours of the results.
Why This Connection Exists
The Cheshire Oaks is a mile and a half listed race — the same distance as the Epsom Oaks. A filly that wins at Chester over this trip has proved she stays a mile and a half in competitive conditions on a turning track. Epsom is also turning and also a mile and a half. The form translates directly — not approximately, directly.
The Chester Vase is a mile and four and a half furlongs Group 3. The Derby is a mile and a half. The extra half furlong at Chester means Vase winners have already exceeded the Derby distance in a competitive trial. A horse that handles Chester's extra distance and sharp turns has specifically demonstrated the stamina profile the Derby demands.
The Dee Radio preview confirms the historical significance: "It marked the first time in Chester's history that winners of both races went on to win at Epsom in the same year." The coincidence of both happening simultaneously in 2025 is notable — but the underlying reason is not coincidence. The Chester trials are good trials because they test what Epsom tests. They have always been connected. The 2025 results simply made the connection visible.
How the Market Will Respond Today
If I'm The One wins the Cheshire Oaks convincingly, her Oaks price will shorten dramatically. A six-length debut winner who follows up in a listed trial over the Oaks trip is the clearest possible form line available before Epsom. Bookmakers will adjust.
If Benvenuto Cellini wins the Chester Vase, his Derby price will shorten. O'Brien's primary Derby hope completing the Lambourn preparation path would confirm him as the market leader for Epsom. The ante-post Derby market will react within minutes of the result.
The Chester results this afternoon are among the most important ante-post form events of the entire flat season. Watch them carefully.
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Facts verified via web search May 6 2026.