The son of Three Valleys was second on his reappearance at Kempton two weeks ago and deserved this breakthrough success.
He had a good draw on the favoured stands rail and jockey Neil Callan dictated matters from the front.
He gradually upped the tempo and had all his rivals at work with over two furlongs to go. He stretched clear under hands and heels to win by four lengths.
Roger said: "We have had a few of his siblings and they have all acted very well on soft ground so we weren't too worried about that.
"He had the best form coming into the race and has done it nicely."