St Peter's has an excellent choral foundation. The choirs sing at Sunday services, major festivals and weddings. They are directed by Nicholas Robinson, assisted by Alex Flood.
Boys between 7 and 12 and girls between 7 and 17 are welcome to audition at any time to join the choir. If they are successful, they sing with the choir as probationers for about six months and then are admitted as full members. They have opportunities to earn medals and they are paid according to experience and commitment.