[1] The band's lineup is John Mortimer guitar and vocals, Scott Wallace drums and Mark McGrath bass.

The original lineup featured guitarists John Mortimer and Ed Dudley, vocalist Gary Lettice, bassist Robin Begg and drummer Nick Brockie.

[1] In 1983, guitar player Ed Dudley left the band, forming and releasing an album under the moniker Hologram.

[1] Holocaust was one of the Scottish bands in the new wave of British heavy metal scene in the late 1970s and early 1980s, deviating from the more commercial new wave music of the day, and combining earlier metal with the tempo and attitude of punk rock.

[citation needed] The John Mortimer-led Holocaust incorporated many progressive metal, thrash metal and post-punk influences into its sound, releasing complex pieces such as the "Sound of Souls" EP and concept album Covenant.