The young winger had the run of the Stade Gilbert Brutus against the Super League newcomers, who were given perhaps their loudest wake-up call yet.
Clint Greenshields also chimed in with a hat-trick, with the other scores going to Remy Casty, Setamaita Sa, Louis Anderson, Damien Blanch, Daryl Millard and Vincent Duport.
Widnes, for whom Sione Kite scored in the first half, return to the bottom of the league as a result of London's win over Wakefield.
In the day's other match Michael Robertson bagged two tries as the
Australian Robertson took his season tally to six with a try in each half as the Londoners romped to just their second victory of the season.
Tony Clubb, Daniel Sarginson, Kieran Dixon, Liam Colbon and Luke Dorn also crossed for the Broncos.