When do you use Lady in England?

In England, "Lady" is used as a title for women of high social status, such as those who hold certain hereditary peerage titles or who are married to men who hold such titles. It is also used as a courtesy title for the daughters of dukes, marquesses and earls.

For example, the wife of a baron would be referred to as "Lady [husband's first name] [husband's last name]". The daughter of a duke would be referred to as "Lady [first name] [last name]".

In a formal setting, it is appropriate to use the title "Lady" when addressing a woman who holds this title. For example, when writing a letter to the wife of a baron, you would address the envelope as follows:

Lady [husband's first name] [husband's last name]

[Address]