After Alfred and Frederick retired, you'd think the British government would have changed the access codes for the missile, just in case, but after all this time, it still remained the same.
When Alfred tells Bruce Wayne he's in London, and is asked if he means London, England, Alfred replies "There's only one." In reality, there are at least: 1 London, Belize; 1 London, Canada; 1 London, Equatorial Guinea; 1 London, Finland; 1 London, Kiribati; 1 London, Nigeria; 3 Londons, South Africa; and 17 Londons, United States of America as well - a total of at least 27 cities, towns, or villages whose full name is "London". There are many more such communities with "London" as part of their name.