Advent Carols from St. John's is a CD of music from The Choir of St. John's College, Cambridge.
from the booklet included with the CD:
This recording presents a reconstruction of the service for Advent with Carols and within the space available preserves as many aspects as possible of the service as it might be heard on Advent Sunday from St. John's.
The service blends traditional plainsong antiphons, carols and carol-anthems alongside readings and Collects.
You can listen to parts of this CD at Amazon.com. They webcast some of their music at their website.