Swiss Cross (9-2f) justified favouritism in the closing Investec Specialist Bank Handicap.
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The Gerard Butler trained four year old was always prominent under Neil Callan and held on by a narrowly diminishing margin which was just half a length at the line.
Fireback had also raced towards the fore of the 15 runner field and bravely gave chase but he was just caught for second by topweight Tajneed who came with a rare late rattle under Cathy Gannon.
Lui Rei has caught the eye on a couple of occasions this season since joining Robert Cowell and was the subject of late support but he was held-up in rear from his high draw.
He flew home once in the clear and will have gone into plenty of notebooks in finishing fourth.
Butler said: "He's very talented, he's in the groove at the moment and with these sprinters you have to keep going with them.
"He heads to the Wokingham now and we'll see after that. He's a very good horse."
Stan James go 14-1 from 40s about Butler's charge for the big Royal Ascot handicap.