Grandeur claimed the Coral Easter Classic in front of a record modern-day crowd at Lingfield as the first ever British race meetings on Good Friday took place.
Nearly 9,000 were in attendance as Ryan Moore rode the Jeremy Noseda-trained five-year-old to snatch victory from Dick Doughtywylie in the final stride.
The Winter Derby winner Robin Hoods Bay was third at the Surrey track.
In Scotland, Borderlescott just lost to Smoothtalkinrascal at Musselbrough.
Trainer Robin Bastiman described the sprinter as a "legend" after the 12-year-old came out of retirement to come within a nose of winning his own race at the East Lothian track - the Borderlescott Sprint Trophy.
"That was fantastic," Bastiman said. "He still wants to do it. I'm so proud of him - he's a one-off.
"I think everyone in the weighing room was willing him to win, but never mind. He's a legend."
Despite a disappointing showing in the Winter Derby in March, trainer Noseda was confident that Grandeur could perform at Lingfield and the 6-4 favourite duly delivered.
"I said beforehand that today was redemption day and this was redemption," Noseda said.
"I'm slightly disappointed he has made such hard work of it as to me he's better than he's shown today. [But] he's won, that's the main thing, and I'm thrilled."