The "Serious Fraud Office"?
As opposed to the "Not Very Serious Fraud Office"? Or the "Ordinary Fraud Office"?
Where are the dividing lines between "ordinary fraud", "serious fraud" and "not very serious fraud"? And what are the ramifications for the potential perp?
More to the point, who decided that the "Serious" bit of "Serious Fraud Office" was important, leading anyone capable of rational thought (hah!) to believe that ordinary fraud wasn't really all that serious?
Bureaucracy. The mind boggles.