Continuing the purple patch of Joseph O'Brien and Dylan Browne McMonagle, the progressive Limestone (New Bay) edged the photo at the end of Wednesday's G2 Queen's Vase at Royal Ascot. One for the St Leger candidates, the mile-and-three-quarter contest lacked a clear-cut candidate this year and it was only in the dying strides that the colt who races for Valmont, Al Shaqab and Ballylinch Stud put his name on the honour roll ahead of Godolphin's Del Maro (Camelot). The official margin was a nose, with the long-time leader and outsider...