Kieren Fallon and Aidan O'Brien teamed up to take the John Smith's Cup with Mullins Bay at York today.
The 4-1 favourite ran out a comfortable winner of the £150,000 handicap to give Ireland its first success in the race.
The son of Machiavellian came home three lengths clear of Crow Wood, with Realism a further neck away in third and James Caird fourth.
Zero Tolerance set a strong gallop with I'm So Lucky close behind and Realism and James Caird well-placed. Artistic Style, however, lost all chance by being slowly away.
With the field spread out and moving into the centre of the course in the straight, Mullins Bay's high draw in stall 19 proved not to be a disadvantage.
Leading two furlongs out, Mullins Bay quickly put the race beyond doubt to complete a double for Fallon following the victory of Lost Soldier Three in the preceding race.