funnily enough I know someone who managed to get out of any points or conviction etc, simply because they couldn't identify the driver from the photo evidence.
They requested photo evidence and it was not clear at all who was driving, so they sent the NIP back unsigned saying they couldn't remember who was driving and the picture wasn't clear enough to recognise who the driver was (and it
really was unclear)...
Police wrote back asking "we need all the names of the drivers who it could have been then"... two names & addresses went back... little while later they both received a summons to court. They both attended court with the defence "we can't remember who was driving" with section something or other of such and such human rights act - that it's against a persons human rights to prosecute them for having a bad memory..
Anywho, lots of back & forth but in the end the judge agreed that she couldn't prosecute them on the grounds of having a bad memory. I'll see if I can find any info about what I've said above