Possible Clues:

• Endless task overwhelming current group of singers
• Organ manual which controls soft sweet-toned pipes
• Part of a church in front of the altar often separated from the nave by a screen or rail
• Sunday singing group
• Church with old Irish singing group
• Singers from church knocked back port
• Singers in church round one side of altar
• Singers having sheets of paper for broadcast?
• "Amazing Grace" singers
• Service group, of a sort