He refuses to confirm any specifics of the follow-up to 2012's Tragic Idol, but he reports work is well underway. Erlandsson tells Rock Overdose: "They're quite a lot heavier than Tragic Idol. I think some people will be surprised."

And he hints that Holmes - who's just been confirmed as vocalist for death metal supergroup Bloodbath - could move away from his softer singing style of recent outings.