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Slam Dunk Festival

While She Sleeps to headline Slam Dunk Festival’s Jägermeister stage

While She Sleeps on stage at the Forum Hertfordshire during the 2012 Slam Dunk Festival in Hatfield

Slam Dunk Festival

Alan Davies

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Organisers of Hatfield music festival Slam Dunk have confirmed another 10 bands playing this year’s event, including Jägermeister stage headliners While She Sleeps.