Xentrix are an English thrash metal band from Preston, Lancashire. The band were formed in 1984 under the name Sweet Vengeance. They changed their name to Xentrix in 1988, and released four albums – Shattered Existence (1989), For Whose Advantage? (1990), Kin (1992) and Scourge (1996) – before splitting up in 1997. After briefly reuniting in 2005–2006, Xentrix reunited once again in 2013, and they have since released two more albums: Bury the Pain (2019) and Seven Words (2022). As part of the underground metal scene of the late 1980s and early-to-mid 1990s, Xentrix have been referred to as one of the "big four" of English thrash metal, along with Acid Reign, Onslaught and Sabbat.

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.