Discharge are a British hardcore punk band formed in 1977 by Terence "Tezz" Roberts and Royston "Rainy" Wainwright. While the band had substantial line-up changes over its history, the classic line-up from the early 1980s featured bassist Wainwright, drummer Gary Maloney, Anthony "Bones" Roberts playing guitar, and vocalist Kelvin "Cal" Morris (a.k.a. "Cal Voice").