The Broncos had clawed back an eight-point half-time deficit to briefly lead, but the Giants piled on the pressure in the final stages and after two Olly Russell penalties, Harry Rushton crashed over to seal the win.
It proved another near-miss for Mike Eccles’ visitors after last week’s single-point loss to Leeds, as they battle to finish their sole Super League season by moving off the bottom of the table.
But once again there were plenty of positives with Oli Leyland’s outstanding kicking summoning quickfire tries for Hakim Miloudi and Sadiq Adebiyi early in the second half that threatened to light up a low-key encounter.
The Broncos looked sharpest from the off, Adebiyi bulling close before Marcus Stott piled over from close range after a quarter of an hour to give his side a deserved lead.
