Herald angel, Waltham Abbey
Section of the Victorian reredos in Holy Cross parish church, Waltham Abbey, Essex.
This depicts the angel announcing the birth of Jesus to the shepherds:
"In that region there were shepherds living in the fields, keeping watch over their flock by night. Then an angel of the Lord stood before them, and the glory of the Lord shone around them, and they were terrified. But the angel said to them, ‘Do not be afraid; for see—I am bringing you good news of great joy for all the people: to you is born this day in the city of David a Saviour, who is the Messiah, the Lord. This will be a sign for you: you will find a child wrapped in bands of cloth and lying in a manger.’ "
(Luke's Gospel, chapter 2, verses 8-12, NRSV)