There’s a tradition among poets to write a poem to put inside the Christmas cards they send. So, the BBC World Service has commissioned one specially from the poet, dramatist and novelist Michael Symmons Roberts, whose Christian faith is important to his identity and work. But his art is not a direct expression of this, and instead he follows the poet Emily Dickinson’s instruction to "tell all the truth but tell it slant".

Michael has just become a grandfather, so feels keenly the happiness of the arrival of a cherished child, creating a parallel between his own life and the Christmas story of the birth of Jesus. Julian May follows Michael’s creative process as he grapples huge spiritual and personal themes – distilling them to a length which can fit on a Christmas card: a daunting but joyful task.

The programme begins on London’s Oxford Street, where consumerism triggers preparations a full three months before Christmas, and ends with the sealing of the Christmas cards before they are popped into the post box.