The 9/2 favourite - ridden by Josh Moore, son of trainer Gary - started well and pulled away from Rigadin De Beauchene in the home straight to win by 14 lengths.
There was almost a fall for the champion though, with a heavy hit on the final obstacle nearly ending his race early.
But Moore stayed in the plate to coast home in style.
"I should have known better at the last, but we got away with it," Moore told Channel 4.
"He's been nicely handicapped all season. He's a progressive horse and I hope he can keep going that way."
Rigadin De Beauchene, who was second to the same horse at the Sussex National earlier this year, came in ahead of third-placed Monbeg Dude.