have been the victim of number plates theft, therefore call the authorities in charge of this issue and report at once (these are usually the police and DVLA).
It is only logical to expect help from authorities once you’ve reported what happened. If there’s a possibility, they’ll do everything in their power to return the plates to you, because someone might have found them.
If not, reporting was the smart thing to do to avoid police stopping you and punishing you for missing the plates.A special procedure is required if your car has had personalized number plates.
Read more on emlii.com