Upon the liberation in 1944, he returned to the Orchestre National de France to become their principal conductor, a post he held until 1947. The first concert consisted of works from each of the Allied countries, including the "Hymne à la Justice" by Magnard. He made sure a wide range of contemporary music was played, and the first season included a complete Stravinsky cycle. In his final year with the orchestra, he brought it to England to join Sir Thomas Beecham and the Royal Philharmonic in a concert organized by Jack Hylton that filled the Harringay Arena with 13,500 listeners.