"I can see my plate on the rear window while driving back from Halfords to get a new plate made?

I buy a sensor parking has a plate for the plate, but Honda has made the board too and I have to lead to Halfords to buy a plate to fit against me parking sensor plate.

No problem. Technically you are committing a crime because it does not illuminate when the lights are on, but even the most meticulous Copper has some common sense. Do not forget to take your V5 and means of identification.