The Choir comprises up to 25 boy Choristers who sing the Treble line, while Alto, Tenor and Bass parts are taken by 12 men including professional singers, Choral Scholars, and volunteers from St Paul's Parish.

Boys in Grades Four and Five, who are in training for their time in The Choir, are known as The Trebles, and sing at separate liturgies throughout the week.

Mr. John Robinson, The Director of Music, trains and directs the Choir throughly daily rehearsals at the Choir School. The Assistant Organist (currently Dr. Jonathan Wessler), accompanies the Choir and directs the Parish Choir. The department is delighted to have an Organ Scholar, Alexander Pattavina, who is gaining experience in accompaniment and direction.