I'd imagine this is the best place to ask as you guys know about these things.
I was on my bike earlier, and I was doing 44.7mph in a 50 limit but it might have looked more like 85mph if you were coming the other way. Anyway there was a policeman coming the other way in a freelander, but I didn't see him until he was 100 feet or so away, because there was a line of trees so he was slightly in the shade. (I saw a white car coming but didn't spot it was a police car). I continued riding and didn't see him again.
Is there any chance that he could unjustly accuse me of speeding and use his ANPR to produce some obviously false evidence and then send me to prison? Given that everyone and his dog has a dash cam these days I doubt the coppers go without them...