Never made myself known on here before, but finally have something to add. Was wondering - what about using magnetic tape for number plates? (Ok so it's not the idea of the Century.) I'm amazed Velcro works, although it must do otherwise nobody would use it - you'd think the rear plate would get pulled off with the drag at higher speeds.
If your plate is of daft small size then you will get attention off cops. If your plates are in a different font, you will get attention off cops.
Havin mm's taken off the border so that it fits the gap spot on is fine. Now I'm talking about cops from Lancashire, other constabularys might be different but they tend to look out for chavs with the tiny plates or if you have a stupid font.