Would Constitution River and Diamond Necklace stay a mile and a half based on their pedigrees?
Bloodstock expert Kitty Trice delves into the pedigrees of the Ballydoyle stars to determine the possible limits of their stamina

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Constitution River’s sparkling display in the Dee Stakes at Chester last week gives Coolmore a high-class headache.
Last year’s clear-cut Futurity Stakes winner had not been seen since that Group 2 success in August but made a fine return to action with a seven-length victory on the Roodee and received pretty high praise by Ryan Moore, a man who famously keeps his cards close to his chest.
Connections appear to be leaning towards the Prix du Jockey Club but a look at his pedigree can maybe indicate where his destiny ultimately lies.
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Published on inDerby festival
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