As far as I’m aware, a lot of “private” jets are not “owned” by a person. They are owned by a shell corporation that exclusively sells tickets to a few people (typically family members of the “not owner”).
It dodges quite a few requirements and laws required by "private owners, and apparently also obfuscates jet tracking (for example, like Elon’s jet).
Yeah, good luck getting the EU to pay that. GB kicks everyone out and then expects them to still pay for the properties, that’s fucking hilarious. EU is going to laugh them out of the door.