They were both from the same constabulary but one was a fixed camera and the other a mobile unit. Trouble is, I'm not sure how fast I was going (could've been tripple figures). I slammed the breaks on when I saw the van and it was two lanes with lots of other traffic so they might not have had an accurate fix on my bike. Plus, I would've been within the limit by the time I went past them (which is when they would have got to see my plate). And to say I was going in excess of 70mph is not necessarily a fine-able offense until you hit something like 79mph. On one hand, I could ask them and if they say they don't know the exact speed, then I might be able to get away with it. but on the other hand, they might take a closer look and say, "actually it was over 100mph and we're going to ban you"