William Buick will retain the ride on the supplemented Libertarian in the Irish Derby at the Curragh on Saturday.

The colt has recently been purchased by Godolphin and will be having his final start for Elaine Burke in Ireland this weekend before he joins Saeed bin Suroor in Newmarket.

Unraced as a two-year-old, Libertarian has made giant strides this season, winning a Pontefract maiden in April before disappointing in the Sandown Classic Trial.

The son of New Approach bounced back to win the Dante at York under Buick, who also rode him to finish a fine second to Ruler Of The World, whom he will meet again this weekend, in the English Derby at Epsom.

"He did a routine canter this morning and will be supplemented," Karl Burke, the North Yorkshire trainer's husband and assistant, said.

"We are very happy with him and he has come on again."