Man of the match Deacon stepped through Hull's defence midway through the second half to crown his performance before Vagana and Jeffries wrapped up a convincing win in the closing minutes.
But Faye's dismissal - shown his second yellow card for a reckless challenge on Barmby - prompted one final Hull rally and their reward was forthcoming after Bullard stepped inside and shot fiercely.
As the game progressed, Hull appeared more fatigued, and when Richard Horne's laboured pass went loose Daryl Millard pounced and stepped twice before fending off Tansey to score a great try - again converted by Cooke.