London Broncos head coach Tony Rea said his side are lacking effort at the start of matches after Castleford Tigers thrashed Broncos 54-6 in the Super League.
Rea’s men are without a victory this season and they have been beaten in all seven of their league matches.
Justin Carney and Michael Shenton grabbed two tries each while Michael Channing, Oliver Holmes, Liam Finn Craig Huby and Luke Dorn also went over.
Jamie Ellis kicked nine conversions out of nine while Broncos reply came from Mike McMeeken, with Joshua Drinkwater adding the conversion.
“We're disappointed how we played and how we responded to things,” Rea told the club website.
“We're definitely fighters, we're just not getting into the contest; we're having trouble being strong at the front end of the game.
“It would be nice to be in control, we're just not getting that bit right. We're getting blown away too easily and taken out of the contest.
“We're losing the ground war, the ruck war, the collision war consistently. We're just being blown away in that area of the field and that's a fair bit of individual responsibility.
"I think there's a little bit of a lack of effort at the start of the game, maybe we're trying to almost save energy for the back end.
"I think our real challenge is to put it all out there, I think we're holding back.”
Broncos take a break from league action on Friday evening as they take on Catalan Dragons in the Tetley's Challenge Cup fourth round.