Slow Horses

Bad writing. Example:

“The chances of a parking revenue attendant - or whatever they were called today - doing the rounds after midnight were slim, but not non-existent.”

What is the point of that parenthetical aside? Is it the narrator who does not know what to call the people in this job? The author? The copy editor? If you don't know what something is called, look it up and learn. That goes for authors as well as their characters.