UK government only pays for 24 hour security for the queen, Charles and Camilla and the Cambridges.
Other royals have paid protection whilst they are on official duties only.
I'm a bit surprised that H&M and Archie all seem to need 24 hour protection and that this is always cited as the key reason they need to make lots of money just to pay for it.
Are they really in so much danger or is this about prestige? Plenty of famous people don't have 24 hour security including many royals. If H&M do receive death threats this is surely similar to most people who have a big presence on social media- I imagine Piers Morgan probably gets more.