Editors have enjoyed a rather swift rise to the top as far as British bands in the U.S. go. Nearly half a year after playing cozy L.A. venue Spaceland, the band sells out Hollywood’s Avalon theatre that boasts a near 1,500 capacity. Back home in the U.K., the band’s ascent has been far more rapid. From modest shows to headlining festivals and a Mercury Prize nomination, Editors were anointed U.K.’s next big thing in a year that also saw that...