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This Christmas Eve, for the first time, Croydon Minster's midnight mass is being broadcast to millions. But when you're a choirboy whose voice is about to break, there's no guarantee you'll make it.

In the edition of The Untold, two boys are coming to the end of their time in Croydon Minster Boy's choir. They're desperate to hold on until Christmas Eve, when they will have the chance to sing for the nation at BBC One's Midnight Mass.

If they can hit the notes there's the chance of a solo, but with a voice deepening every day, only time will tell.

Produced by Sam Peach with Andy Fallon