Various, Red Alert, Lightning Rock, Godspeed, Red Alert, Warren Mason, Lotus, Metal Mercenaries, Dearrow, Scott Abrahams, Godspeed

Bay Area Thrash Metal

Riffs cut like machine tools, tempos past 200bpm, and a garage circuit that rewrote American metal.

West Midlands Metal

Downtuned riffs from a factory city — Sabbath to grindcore, four decades of Birmingham making music heavier.