Hundreds gather in the church of St Martin-in-the-Fields to celebrate Ascension Day, marking the day when Christians remember the departure of the risen Jesus from this earth, leaving his disciples with the promise of the gift of his Holy Spirit. Music includes extracts from J S Bach's B minor Mass sung by the BBC Daily Service Singers and the Choir of St Martin-in-the Fields directed by Richard Tanner and accompanied by Andrew Earis and members of Canzona. The preacher is the Lord Bishop of Norwich, the Rt Revd Graham James. The celebrant is the vicar of St Martin's, the Revd Dr Sam Wells. Producer: Clair Jaquiss.