Harrow's vocal talent gathered in Speech Room to compete in the annual Glees and Twelves competition.
The event sees each of the 12 Houses select two groups of boys. The first is the Glees who will choose a song and sing it in an unaccompanied close-harmony arrangement.
The Twelves is a larger group of boys who perform a unison song of any style with piano accompaniment.
The event was judged by Andrew Carwood, Director of Music at St Paul’s Cathedral.