I have just had a letter. Doing 40 in a 20mph. Was on M1 other day and suddenly there were signs for a 20mph limit but everyone was keeping around same speed. Suddenly saw lots of flashing going on in my mirror and knew I'd been flashed with everyone else. Worried sick. No points on licence. Worries I'll have to go to court or a massive fine of my weekly income. Feel so gutted as I'm usually so aware, just need to not go with the speed of the flow next time!