Howorth says: "I have injured my neck and am unable to move my head more than an inch or two in any direction - and I now have the burden of making some pretty weighty decisions for myself.

"In order to continue performing live, I am aggressively seeking treatment and must remain at home in Los Angeles. I am devastated that our European shows are affected by this but in order to keep moving forward with the band, it's imperative to work on getting better."