I'm not sure what you mean?
You may fit a vehicle with any other colour light save for flashing blue as that would mimic the emergency services.
I suppose that one could argue that unless you deploy them it would not come to attention but the offence is in having it fitted rather than deploying flashing blue lights.
Can I clarify anything for you?
Well, it doesn't really matter why it matters. The point is that is the law.
It is a vehicle defect offence which carries 3 points and a fine but the real sting is the impound fees.
As I said, the offence is in having the lights fitting not in deploying them.
Yes, as I said.
it is in the construction and use legislation upon lights.
They probably won't release the vehicle until the lights are removed and replaced.
The law is set and they will pursue this.
This is a vehicle defect offence.
They may give you an improvement notice instead possibly but flashing blue lights are usually taken fairly seriously.