The sibling duo’s follow-up EP spikes their off-kilter pop with new darkness, adding atmospheric balladry to their glorious racketFrom South LondonRecommended if you like Charli xcx, Confidence Man, KlaxonsUp next UK tour starts 21 AprilIf this was April 2008, Punchbag, AKA south London siblings Clara and Anders Bach, would be headlining an NME tour alongside Alphabeat and Frankmusik, while the Po