Hozier has confirmed that he’ll perform a set at Glastonbury Festival today (June 23), as he releases his new single ‘Unknown / Nth’.The Irish soloist wrote in a Tweet that he is “thrilled” to be playing the festival’s Woodsies stage (FKA John Peel Stage) tonight at 7.30pm BST.With the news comes the release of ‘Unknown / Nth’, a glacial new song that features on the singer-songwriter’s forthcoming album ‘Unreal Unearth’.Speaking about the track, Hozier said: “The title comes from the expression of an unknown but large number, i.e. ‘Nth’.