A reg number is a good start but a reg plate can be changed. Make sure that your local police report contains the chassis number and the vin number, and the police report is registered on the international police database for righthand drive countries.
If a similar camper turned up in Ireland / Hong Kong / Australia, the registration process requests a valid vin number if the export license is questionable, but if a police report is not on the system, it can slip through.
Malcolm
Ps, the extra details is a pain in the backside for the reporting police officer.