Successful in a point-to-point when trained by John Halley, the son of Westerner disappointingly pulled up on his most recent start at Tramore on New Year's Day.
Well-fancied to make the breakthrough over flights this evening, the six-year-old was sent off the 7/4 favourite from early shows of 7/2.
Settled behind the leaders on the inner, the bay victor improved into a share of the lead before four out. Headed and pushed along from the next, he soon dropped off the front pair and appeared to be struggling in third.
Ridden away from the second last, he came with a renewed effort approaching the final flight, getting to the front inside the final 150 yards before going on to prevail by a length-and-three-parts.
Sammy Smart (7/2) appeared to be travelling best approaching the straight, but he faded tamely once ridden after the second last, eventually finishing fifth.
"He's a galloper and there is plenty of fun to be had with him over the summer," said Blackmore who was earlier successful on Coole Arcade.
"That's only his third run for Henry so hopefully he can continue to improve."