its 2020 edition was cancelled due to the coronavirus pandemic.Back in June, the first names for Slam Dunk 2021 were announced, including headliners Sum 41 and Don Broco, and the travelling Punk In Drublic showcase, which includes NOFX, Pennywise, Me First And The Gimme Gimmes, Reel Big Fish, the Vandals and Face To Face.Now, a whole host of new names have been added to the line-up, including Billy Talent, While She Sleeps, Code Orange, The Wonder Years and many more.See the full list of names