They do not need to amend it.

A copper tried to take me to court on my motorbike and said I was doing some silly speed @ 10.30 AM instead of PM.

I took it to court, magistrate said it was a clerical error and tough. Fortunately though, I had the repair paperwork from the rebuild on my bike to prove that it was:

a/ not possible due to mechanical problems (headgasket had gone and had repair paperwork to prove it)

b/ the magistrate knew the bit of road I had been "speeding" on and agreed that it would not have been possible to do what the copper said I had been doing as I would have been dead. 64 mph turning right on a "dot-in-the-road" roundabout when you could only turn left/right with a pub opposite is not possible, and the roundabout it the size of a car on a Honda CG125 commuter bike ain't possible. Period.

If the magistrate hadn't been sensible though, I'd would have had a ban.

Anyway, I digress, you CAN get done, the day will not make a difference as the cop car will have you on camera, your face, your registration and a permanent date / time stamp on the footage.

3 points, your way!!!