In 2010 Rees returned to Larbre Compétition in the Le Mans Series, the same team with which he won the Interlagos round of the championship in 2007 - at that time, driving an Aston Martin DBR9. In 2010, after wins in the opening event at Paul Ricard, at the Algarve, and Hungaroring, and a fourth place in Spa-Francorchamps, Larbre Compétition secured the Team's Championship with its Saleen S7-R in the GT1 category. Rees went on to win his third race in the 2010 championship at Silverstone, in the closure of the season. Larbre Compétition also won the 2010 edition of the prestigious 24 Hours of Le Mans.