Got caught about 18 months ago, my first speeding fine since 1988, apparently doing 37 in a 30 limit on my 350 AJS. The particular bit of road had multiple changes of limit speed over about a mile or so. Got photographed by a camera van, which I had seen. I genuinely didn't think that I was speeding at that point, so I decided to question the fine.

Ticket showed the rear numberplate of my bike, but no indication of where I was relation on the road location of the speed limit signs.
So I asked exactly where the photoo was taken, and while I was at it, asked for evidence that the camera had been calibrated that morning.

Still no joy, so asked for calibration certificate (by now I was feeling a bit bolshie), which they sent me. Then I asked for exact co-ordidates of where the van was the camera van was sited.

By the time all this was going on, I knew that I was out of the time limit for doing a speed awareness course and therefore would have to pay the full fine plus 3 points. But at this point, they were also getting a bit peeved, so they phoned me up. A very nice lady said that if I still felt strongly about it, I should have to attend court and argue my point. I told her, who were they going to believe, me or the camera - certainly not me.

To cut a long story a bit short, she agreed I could do the course, and wouldn't have any points added. Dn't think I actually won, though...