Looks like Bring Me The Horizon are teasing something as a cryptic billboard appeared in London with the words “Do you wanna start a cult with me?”.

Along with the text is a phone number. When called, a woman answers saying “They’re making me do this. I didn’t know what I was getting myself into” followed by a clip of music.

There’s also this website joinmantra.org that leads to more clues and mentions the date August 21, 2018.