To complicate this further, "The City" or "The City of London" refers to a small area in central London where a lot of banks and financial institutions are headquartered. London as a whole is called "London" or "Greater London", but not "The city of London".

In the UK, "The City" is often used to refer to the London financial industry, much like "Westminster" is used to refer to the central government.

"Town" refers to urban centres in general, not just London.