1. Calling a duke "Lord X" or his wife "Lady X," or saying "my lord" or "my lady" to them.
2. Calling a peer "Lord <Surname>" (or his wife "Lady <Surname>") when his title differs from his surname.
3. Calling a peer "Lord <Firstname> <Surname>" or "Lord <Firstname> <Title>."
4. Calling the wife of a peer "Lady <Firstname>" or "Lady <Firstname> <Surname>" or "Lady <Firstname> <Husband'sTitle>, e.g., Lady Sally Jersey.
5. Giving a courtesy title to a peer's heir who is not also his son.
6. Calling the son of a peer "Lord <Surname>."
7. Calling the wife of the son of a peer "Lady <Surname>."
8. Calling the daughter of a peer "Lady <Surname>."
9. Calling the daughter of a duke, marquess, or earl "Miss <Surname>."
10. Calling the wife of the younger son of a duke or marquess "Lady <HerFirstname>."