Omer Meir Wellber makes his Proms debut with the BBC Philharmonic Orchestra in a performance of Israeli composer Ben-Haim's emotive Symphony No 1, Schoenberg's revolutionary Five Pieces for Orchestra and Robert Schumann's mould-breaking Symphony No 4 in D minor. They are joined by South Korean pianist Yeol Eum Son for Mozart's fiendish Piano Concerto No 15 in B flat.