The Old Lady of Threadneedle Street

THE Bank of England has not changed its locks for more than 70 years, it was revealed yesterday.
...

The Bank admitted it fitted new locks during a refurbishment in the 1930s as the country prepared for war, and had changed very little since. Although it refuses to talk about security publicly, it made the revelation to the Master Locksmiths Association.

The locksmiths have launched a campaign to persuade home owners to change their locks more often to improve security.

Myself: Drop your allegory and move away. Keep your hands above your head. No sudden tropes my friend. Let's keep this nice and literal.