Mozart's last orchestral work, the Clarinet Concerto, is heard on the instrument Mozart originally composed for, alongside another of his most enduringly popular pieces, the serenade for strings Eine kleine Nachtmusik.

It is no understatement to say that Mozart’s Clarinet Concerto (which we should really call a Basset Clarinet Concerto) is one of those pieces that changed the history of music. 21st Century audiences are so familiar with the sound of the clarinet – it is inextricably linked with smooth romantic melodies or the iconic opening of Rhapsody in Blue – but when Mozart unveiled the piece its sound would have shocked audiences. In this performance Katherine Spencer plays it on a specially commissioned basset clarinet, the instrument for which Mozart originally composed it, aiming to recapture that sense of wonder and delight.