Sonisphere festival have added Mastodon, Slayer, Karnivool and more to their July 2014 edition.
Today’s additions are Slayer, Karnivool, Airbourne, Mastodon, Alice In Chains, Ghost and Gojira.
It follows the announcement of Metallica, Iron Maiden and The Prodigy as headliners of the returning Knebworth rock and metal festival.