What's on the letter is irrelevant, and minor errors can be corrected at court.
How does one correct an error in a letter at court?
Because the live witness can explain and correct the error, surely? Especially if it's something like an incorrect photo at this stage, which isn't even required?
I also doubt you got a NIP from Devon and Cornwall police for driving on the M4!
Sorry, typo! Meant M5, of course.
Thing is, as it's the actual speed photo that contains the error, if "rear plate" does refer to the numberplate then the speed may be incorrect - i.e. it may be measuring the speed of a car travelling on the other carriageway in the other direction. So it's more fundamental than just something like a typo in a letter.
At this point, you're only being asked to name who was driving the vehicle at the time.
EROS is the system used to produce NIPs - the chances are they have the correct image and have simply used a different frame. Was this a static camera or a mobile camera van? However, the chances are some overworked Police Staff member has simply selected the wrong drop-down box on the software.
The pictures on the NIP have no relevant however, as they are just to identify the vehicle involved rather than being the "evidential copies" relied on further down the line.