There's several things that don't add up there.
Firstly, assuming they were in a british reg car, when they were stopped the first time they'd have been forced to pay the fine - they quite literally make you follow them to the nearest cashpoint. If you can't pay, they take your car. So if they were stopped, there's no way they'd have let them go without paying.
If they were flashed by a camera, then there's no way it would catch up with them if they're in a british registered car. When the autoroutes were clear (which they are 99% of the time), I'd sit at 100-130MPH and never slow for the cameras. Got flashed more times than I can count, often with passengers pulling funny faces/making gestures at the camera etc, and when I was stopped by a gendarme with a radar gun for doing 110MPH in a 70MPH they simply made me pay the fine, with no mention of previous infractions. Ditto with border controls, which I passed many many times. I was once flashed at quite a bit more than 130MPH, and knew one guy in an R8 and another in a Panamera who were flashed at close to their cars max speed, again nothing happened to them.
The simple fact is, if you're in a foreign registered car abroad, there is no way a fine from any automated camera will catch up with you. That's the whole reason they've introduced this legislation.
Sorry for taking this thread massively off topic, but there's a huge amount of misinformation surrounding this stuff and it's one of the few things I actually know a bit about