Hampshire, U.K.-born indie pop trio Blaenavon (pronounced bline-av-un) combine vibrant melodies and rhythms with darker lyrics and themes. Ben Gregory (vocals), Frank Wright (bass), and Harris McMillan (drums) met midway through secondary school, where, upon discovering their musical talents, quickly formed a band; at first it was just another way to have fun, until they won their final year talent contest in 2013 -- with a cover of Muse's "Knights of Cydonia." With a newfound drive -- and a freshly inked recording deal with Transgressive -- they released their debut EP, Koso,...