I will say one thing. Harry keeps banging on about safety...just wanting money for safety.
I actually think Harry has a screw loose because surely by now he knows how royal protection works!!
Abroad, royal protection officers don't have the right to carry guns automatically as no foreigner does. Even if they did, they wouldn't be privy to a states security intelligence which means their charges are not safe, since they could be blindsided by that lack of intelligence at any time.
So what happens is if the queen etc travels abroad there is a reciprocal and the country she visits organizes safety. It would cost our government millions to protect the Sussex's yearly, until they day they ALL die. Why would we do it if they don't work for us.