I thought this would be the case. I was trying to picture lots of people with a pile of photos, counting the little lines and working out the speeds and then thought, nah, they'll just look at the reg and send it to the owner.
I was in a 40 limit and tried going at 35mph and seeing how long it'd take to get down to 25mph without braking, and it's quite a distance which further enforces my position that I was going WELL under the limit.
I suppose a car could have been going too fast in the opposite direction, but to be honest I can't remember.
Thanks.
MS