Pat Smullen set out to make the mile-and-a-half contest a true test on Unique Pose, but he could not quite shake off all his rivals in the straight.

Declan McDonogh brought Right Key (3-1) to challenge in the final furlong and Lady O’Reilly’s filly led in the dying strides to win by half a length, with Saintly Rachel third.

James Kelly, racing manager to the owner, said: “She’s a difficult filly and is very fizzy at home.

“Her lad Chris Caldin has done a very good job with her. She’s very temperamental, like a lot of Key Of Luck horses.

“Lady O’Reilly had thought of going for the Ribblesdale Stakes at Royal Ascot at York, but came here instead. The prize money in Ireland is so good at the moment, so she decided to support this race.

“She’ll probably go for the Pretty Polly Stakes at the Curragh and may be supplemented for the Irish Oaks. She could go for the the Yorkshire Oaks later, or a Group Two in France.”

Smullen and trainer Dermot Weld had earlier combined to score with Golden Arrow, who looked a smart prospect when making a winning debut in the Kerry Spring Water Rochestown Stakes.

The jockey allowed the son of Danehill to recover from a slow start before asking him for an effort on the outside a furlong out.

The 8-1 shot soon took command and galloped on well to take the Listed event in good style by three lengths from Duff.

British raider Ajigolo, trained by Mick Channon, was only fifth of the six runners after making the early pace.

Weld’s travelling head lad Whacker O’Brien said: “There are no definite plans for him but he might go for a race at the Curragh during Irish Derby weekend.

“He’s a nice horse and has won well. We’re not surprised as he has been working well at home.”

Smullen added: “He’s not over-big but has a great heart and is a nice horse.”

Of the disappointing Ajigolo, jockey Tony Culhane said: “He didn’t feel right. He was all at sea and the further he went the worse he was going.”