July 24-26 will see this year's Tramlines festival taking place in Sheffield, and they've just announced the first round of names. Billings catching our eye most include Ghostpoet, Blanck Mass, Knifeworld, Walls, Slaves, Roman Flugel and Dutch Uncles, while headliners Buzzcocks, The Sugarhill Gang, Billy Bragg and Martha Reeves will also be lining up. Tickets and the like are over at the festival's website, and there's a quick trailer down below: