Allthingsuk.weebly.com/aaa is a screamer subpage, the creator remains unknown.
The website is normally designed to teach the user about the United Kingdom related-stereotypes, such as their history and culture, and more, the site is pretty normal, but there is a secret subpage of this website that is actually hard to find, there is no part where they give a clue about the secret screamer, the user found out the creator secret, by typing /aaa on the search address, the screamer was only added because she wanted to scare people, when entered, a GIF of Regan MacNeil from The Exorcist pops-up on the screen, since it's a gif, regarding that there will be no sound playing.
There is another screamer similar to this called Imcodingfor.fun, when visited, the site is very normal, and nothing happens, there are some sections labeled "Useful items", "Social Medias", on the Useful items section, there is a clickable text: "Shhh..", when the user clicks on it, the player will get a dialog box message: "You found it.", when the player clicks ok, they will be greeted by a GIF of Regan MacNeil.
NOTE: The following website contains a screamer!