Leeds put their World Club Challenge disappointment behind them by claiming their first away win over St Helens for five years as they secured a 20-12 victory.
England winger Ryan Hall scored two tries at Langtree Park, while Kylie Leuluai also crossed, as the Super League champions atoned for last year's 46-6 hammering to leave Saints still looking for a first home win under coach Nathan Brown.
The bright spot for St Helens was an impressive debut by 18-year-old England academy international centre Mark Percival, who carved out two consolation tries for his winger Francis Meli, while Jonny Lomax crossed early on.
London climbed off the bottom of the Super League table with a seven-try romp at fellow strugglers Salford as they secured a 38-4 victory.
The Broncos had conceded 138 points in four opening defeats but were in front 22-0 at half-time.
