A number of years back I was caught doing 69mph in a 30zone
Sounds bad I know however when I appeared in court the Judge had local knowledge of the road. A dual carriageway which is reduced to 30mph for short stretch.
"I know the road well son, you wont be doing that speed again in a hurry"
"No Sir

Your Hounour I wont!!!"
3points and a £90 fine.
I was fortunate!