The music for this is basically Credo 1 from the Liber, with a few tripping-up differences here and there. The last phrase, however, is taken from Tallis' Missa Puer Natus est Nobis—it isn't known whether he only set this last phrase, or whether the rest has been lost. You'll notice
that there are several bows during the course of the Credo.
The homily, on this occasion by Fr Jerome Bertram of the Oratory, follows the Credo.