Is there no win no fee companies that will look at this?
I would have thought they need "evidence" (photo etc) not just their word. If a police officer can randomly say someone was doing something when they werent the country would be in a world of trouble. Personally i would have a good read around, pistonheads as a good example, and see if anyone else has challenged such cases.
Long story short, i got stopped on my motorbike a few years back after attending a popular bike meet on the way home a few miles down the road from it, i had just literally almost been knocked off my bike by a speeding car over a crest of a hill (copper waiting at the bottom), they watched the car go past and then pulled us all in, we werent speeding as a mate was running in his bike.
They were out that night to stop bikers and check for small plates, illegal exhausts etc and fully admitted it even when asked if they had seen what almost happened, there response was, we are not interested in cars tonight!
It was actually quite amusing in the end, a full blown shouting and swearing match with a copper who insisted he could give me points for a small plate, i begged for the points, he ended up giving me a correction notice, strange that