Lambourn produced a beardown decorativeness to triumph nan Chester Vase Stakes successful a starring proceedings for adjacent month's Derby astatine Epsom.
The 11-8 favourite, nether jockey Ryan Moore, was trailing successful 3rd going into nan last consecutive but kicked connected and won by a magnitude and a half.
Lazy Griff vanished 2nd arsenic Convergent claimed third.
"He looked a thorough stayer and while he was a small connected and disconnected nan bridle, erstwhile nan penny dropped, he came location really strongly," said trainer Aidan O'Brien, who won nan Chester Vase Stakes for a record-extending 11th time.
He added: "He sewage nan travel really good and he's gone done nan statement nicely.
"At this stage, you'd person to opportunity he's connected nan Epsom squad but this is simply a engaged week for nan trials. We've sewage Lingfield, there's Leopardstown and past there's York too.
"We'll conscionable person to spot really they each get connected but we were reasoning of sending him to Epsom, arsenic they study truthful overmuch erstwhile they spell to Chester."