Why is it not possible to identify this upon the insurance database?
You mean because it is not on the index number?
Sorry for the delay. This dropped off my question list.
They will just be prosecuting because they cannot find this vehicle on the database. That doesn't mean it is not insured if they are covering it by means of it's serial number. You can get an insurance certificate to establish that.
The only other thing I can think of is that they may be arguing that the insurance needs to be in the name of the registered keeper. they do sometimes raise that. In fact, it is wrong in law. The only duty is to keep it continuously insured. Somebody else's cover is perfectly fine as long as they have primary cover for that vehicle.
Can I clarify anything for you?
How did you plead not guilty before the summons?
But how could you plead not guilty before the summons?