High Voltage Announces Further Acts For 2011 Following the launch of the UK’s new prestige rock festival, in 2010, High Voltage returns in 2011 with exclusive performances from headliners Judas Priest and Dream Theater, UK festival exclusives from Black Country Communion, Jethro Tull and Spock’s Beard and performances from Michael Schenker group, Caravan, The Enid, Pallas and Mostly Autumn. The further acts announced are: GO HERE