InterVarsity Press has made some helpful, free resources available along with their recent publication of The 1662 Book of Common Prayer: International Edition, which gently updates the text for contemporary use. 

One of the resources is by the late J.I. Packer entitled, The Gospel in the Prayer Book. IVP writes:

In these pages, Dr. J. I. Packer explains how the gospel of Jesus Christ is at the very center of the Book of Common Prayer (1662). These words were written by Packer when he was a young priest in the Church of England, originally as a series of short pieces to be used as inserts in parish magazines. They are reprinted here with Dr. Packer’s permission.