Cosmic Void Festival returns to London, England from September 18-20, 2026, featuring legendary metal acts Hellhammer, Bloodbath, and Moonspell alongside 37 other artists across multiple venues citywide. This metal festival showcases blackened death metal, classic metal, rock, and thrash death metal across its three-day lineup, with notable performers including Sarcófago, Unleashed, Teitanblood, and rising acts like Wode and Necronautical. The 40-artist roster spans international talent from the United States and United Kingdom, making it a premier destination for extreme metal fans. Festival organizers have confirmed the lineup status for this citywide London metal event.