It is the custom upon entering church to kneel in one's pew for a prayer of personal preparation for worship. In many churches it is also the custom to bow to the altar on entering and leaving the church as an act of reverence for Christ.
Anglicans do not talk in church before a service but use this time for personal meditation and devotions. At the end of the service some persons kneel for private prayer before leaving. Others sometimes sit to listen to the organ postlude.