Hi Lord Muc,
The information i’ve always been told is that a vehicle can only be registered once it arrives on the shores of the country that the vehicle has been sold in. It cannot be registered in Germany when the vehicle has been sold in the UK, so it would be close to the delivery where the vehicle can be registered
“Dealerships are allocated the registration of a car between one and two weeks before it is delivered.” – OSV Ltd on google
If anyone else understands this different, please let me know