No Half Measures prompted a shock at Newmarket because the 66-1 outsider gained the July Cup beneath jockey Neil Callan.
Educated by former jockey Richard Hughes, No Half Measures edged previous Large Mojo on the road to win the 145th version of the Group One dash.
Run To Freedom completed third, an additional size and three-quarters again, with Believing in fourth and favorite Notable Speech fifth.
“Over the past couple of years I felt I used to be a bit buried,” Callan advised ITV Racing.
“Final yr was a little bit of a wrestle and this yr’s been a little bit of a wrestle, however you simply anticipate that one horse.
“I used to be open-minded as an outsider however he [Hughes] at all times believed she may run the race as a result of she has good stats and performances over six.
“It is a surreal second.”