Vincent Duport and Louis Anderson both crossed for two tries as the Catalan Dragons stormed to a 36-18 victory over the London Broncos in the capital.
Duport and Anderson struck once either side of the interval as the visitors claimed a deserved triumph.
Shane Rodney, Luke Dorn and Michael Robertson all crossed for Broncos.
The first score was not long in coming as the Catalans romped home when Leon Pryce started a stunning move that saw Anderson surge over and it was the visitors who bossed the opening 15 minutes, claiming their second score when Duport profited after Pryce's kick unsettled the London defence.
Minutes before half-time the home side were given a lifeline when Damien Blanch knocked on near his own line, Rodney powering over to reduce the deficit from the resulting scrum.
It was the Dragons who seized the initiative five minutes into the second half, Duport claiming his second score after the Broncos were penalised close to their own posts.
Just as in the first half the away side really had their tails up, and Anderson helped himself to his second try of the game moments later, finishing off Scott Dureau's kick.
London's defence was non-existent, and the French side were close to securing the points when they grabbed their third try in the space of five minutes, Steve Menzies romping over from close range and Dureau then burst over himself as the Dragons once again cut the men from the capital to ribbons.
To their credit the hosts did splutter back into life again after 63 minutes, Dorn speeding through after Antonio Kaufusi was held just short. And there was more cheer for the Londoners five minutes later, Michael Robertson barging through a handful of tackles to score.
Ian Henderson was then sin-binned after a late hit, but it was Pryce who was to have the final say, bursting over for a late try of his own.