Ten more acts have been added to the festival’s line-up.

Limp Bizkit, Chas and Dave and Dropkick Murphys have been added to the bill for Knebworth’s Sonisphere 2014 show.

Joining them will be heavy rock acts Anthrax, Carnifex, Voodoo Six and Sisters of Mercy.

They will also be joined by Silverstein, The Virginmarys and the Devin Townsend Project.

Headliners Metallica, Prodigy and Iron Maiden will front the weekend in July 4 - 6.

Visit wwww.sonisphere.co.uk for more information.