Wild conspiracy theory - London is becoming the playground of world elites. So security is paramount. These bills are not to keep pedophiles at bay but to prevent some forms of "London spring" of the underclasses or other forms of physical harm towards your friendly neighborhood billionaire that could damage real estate prices. The conservatives goal is to make elites know they are safe here so they could switch to lower profile security details.
I have no better explanation why UK is pushing so hard on its own populace.