Jockey Johnny Murtagh made it 10 wins on the course when beating Askar Tau into second.
"When you're working horses like this, it makes things easy," said Murtagh.
"It was always going to be a big year for this horse.
"It didn't start well for him at Ascot but thankfully he turned things around. He's a good stayer with a good heart and he's improving all time."