Heres a helpful passage from Natalie J Purcells Death Metal Music The Passion and Politics of a Subculture published by the very respectable McFarland   Across the sea in the UK Napalm Death would release Scum in  The twosided album was extremely influential Though side one featured very punkinfluenced guitaring the second side displayed the impressive Death Metal guitarwork of Bill Steer which would spur the Grindcore movement The tempos of the album were incredibly fast with quadrupletime beats and extremely short songs The album also featured deep grunted vocals advocating leftist politics Napalm Death followed Scum with the equally extreme  release From Enslavement to Obliteration Soon British Grindcore bands like Unseen Terror Ripcord Heresy Concrete Sox Carcass The ElectroHippies and others began popping up Carcass adapted the Grindcore formula to include more metallic chugging sections