Mountain Angel, trained by Roger Varian and ridden by James Doyle, won the Listed Wolferton Stakes at Royal Ascot.
The son of Dark Angel - sent off 8/1 - galloped clear with a furlong to travel and was not for catching, readily beating the fast-finishing 15/8 favourite Sir Dragonet, with Regal Reality back in third at 11/2.
Mountain Angel was positioned towards the rear by Doyle early on in the 10-furlong event, but whereas Sir Dragonet was sent to the wide outside by Ryan Moore on turning in, the winner went for the rail and found a gap up the inside of the weakening Forest Ranger.
Prince Eiji led with a little over a furlong to travel but Mountain Angel powered through the mud to quickly put daylight between himself and his rivals.
Sir Dragonet snatched second on the line after a late, grinding run, with Regal Reality and fourth home Prince Eiji (22/1) close behind in a bunched finish for the minor honours which also included Extra Elusive.
Betfair make Mountain Angel 20/1 for the Coral-Eclipse at Sandown Park next month.
Varian said: "He had everything in his favour. He's a good horse fresh. He's showed that over the years. He gets the trip well, he loves a bit of dig in the ground and he's trained well at home.
"He ran very well in the race last year when he got shuffled back early on from stall one. It was probably a slightly stronger renewal last year so we thought he'd run well today.
"He doesn't need over-racing. We took him to Bahrain on a fact-finding mission in the autumn to see if he'd be an international horse, but he didn't like that firm ground, so I think we'll bide our time with him.
"He ran well in a couple of Group races in France last year, so he'll deliver when he's got things in his favour.
"He is not just about first time out. He is a horse that when conditions suit he is pretty smart - if the trainer runs him on ground too fast he is probably not going to give you the same performance.
"He was placed in the Prix Dollar last year and a Group Three at Deauville. On the back of that he has got a Group race in him."
Doyle, riding his third winner of the week, said: "It worked out perfectly for him and he loved the ground.
"I travelled really good, I could have done with them going a bit quicker but he just carted me into it.
"I pulled my goggles down and when we turned in I couldn't believe how much room we had. I didn't want to get to the front too soon, but he knuckled down well."
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