Desert Crown (GB) (Nathaniel {Ire}), who was ruled out of the Prince of Wales's S. at Royal Ascot after suffering a setback in training, has resumed light exercise in Newmarket. Last year's Derby winner, trained by Sir Michael Stoute, has raced just four times in three years, and was beaten for the first time on his sole start this season when second to Hukum (GB) in the Brigadier Gerard S. on his reappearance after a 12-month absence. Philip Robinson, assistant racing manager to Desert Crown's owner Saeed Suhail, said, "He's...