Onslaught are a British thrash metal band from Bristol, England, active from 1982 to 1991 and again since 2005. The band initially drew influences from US and British hardcore punk bands such as Discharge and the Exploited, as well as the new wave of British heavy metal, and eventually adopted a straightforward thrash metal sound. They have been recognised as pioneers of the British thrash metal scene, and have been referred to as one of the country's so-called "big four", along with Sabbat, Xentrix and Acid Reign. To date, Onslaught have released seven studio albums, one compilation, four singles and two live recordings: a live album and a live DVD.

Sabbat were an English thrash metal band from Nottingham consisting of Martin Walkyier (vocals), Andy Sneap (guitars), Simon Jones (guitars), Frazer Craske (bass) and Simon Negus (drums). They are considered one of the "big four" of British thrash metal along with Acid Reign, Onslaught and Xentrix, who were all responsible for developing and popularizing the country's thrash metal scene in the late 1980s and early 1990s. Over their initial six-year run Sabbat released three studio albums, four demos, two split singles/compilation albums, two singles and a live VHS. In 1988, the band released their debut album History of a Time to Come, which earned them further recognition. Their next album, Dreamweaver (1989), was also critically acclaimed. Shortly after the release of Mourning Has Broken (1991), tensions with the band began to surface, most of them revolved around money and Sabbat disbanded as a result. After an attempted reunion in 2001 which was blocked by Sneap, the original Sabbat lineup reunited in 2006. In December of that year they performed together for the first time in sixteen years at five different venues in England. One was a warm-up gig in Nottingham, the other four in support of Cradle of Filth. The band has continued to perform live around the world but has not released any new material. In a January 2014 interview with Decibel magazine Andy Sneap confirmed that Sabbat had once again split-up.