Notable for one of the earliest uses of dual vocalists in hardcore punk , and for recording a number of sessions for BBC Radio 1 DJ John Peel , Extreme Noise Terror started as a crust punk band and helped characterise the early , archetypal grindcore sound with fiercely political lyrics , grinding guitars , extremely fast tempo and often very short songs .
They also recorded a number of sessions for BBC Radio 1 DJ John Peel .