The Dark Lord

Not sure about this. If Earth blew up and Prince Charles somehow survived then I think it would be odd and redundant to keep referring to him as a prince just because it was a title he used to hold in a previous life.

This answer would benefit from explaining up-front what ETIAS is. Because the first reference to ETIAS is in the first paragraph and is completely unreferenced I ended up clicking the hyperlink and unnecessarily wading through a bunch of text on the European Parliament ThinkTank website to work out what you were on about. There is a description in the third paragraph but I spent 10 minutes of confusion before I got to that point.

Spot on. The 'master of death' thing was only ever part of the mystique of the Hallows, passed on by enthusiasts like Xenophilus Lovegood. They didn't actually make one immortal.

Take another look at the final paragraph of my question. I'm interested in objects, not generic concepts.

@Gallifreyan Googling SEDE suggests it's either a reference to the Spanish for headquarters or the European Parliament's Subcommittee on Security and Defence.

Is 12 Harry Potter questions in one day some kind of record?

You want to try forcing Snape to use the metric system. Good luck with that... Also, your point about technology is a good one and is generally true but there are exceptions. The Hogwarts Express is a case in point.

So someone with a lightsaber would be able to go about freely because the Empire thought the Jedi were discredited ideologically? I'm not convinced.

So Parliamentary procedure requires the first question to be an Open one before a Supplementary one on any topic can be asked? The difference between the need for a written order of questions and the desire to keep questions to the PM secret beforehand makes sense. I guess the presence of Open Questions is the traditional part; MPs and the PM are just playing by the rules?