Sections of rock’s avant-garde feel the need to dress themselves in the armour of technical facility, and indeed some of its practitioners are instrumental virtuosi who base their practice on complexity and sophisticated musical structures. Not The Chewers, who are somewhere to the left of even bands like Sonic Youth or Melvins, in terms of their relationship to the exigencies of performance and their reluctance to trot out any of the conventional significations of rock competence. This is not to say that their music sounds in-competent: it’s in time, it’s in tune, it’s assembled into coherent arrangements …