In the 90s, Newton was bassist of a heavy metal band Dirty Deeds, with singer Pete Franklin, guitarist Barry Fitzgibbon and drummer Dave Cavill.

[4] Newton has continued his association with Harris and Iron Maiden, including engineering or producing many of their releases.

[5][6] Newton, along with guitarist Richie Faulkner (who had been a member of Dirty Deeds),[7] founded hard rock band Voodoo Six in 2003.

[8] The band's first line-up in 2005 also included drummer Dave "Grav" Cavill, vocalist Henry Rundell, and second guitarist Matt Pearce.

[12] Newton has played bass, mixed and engineered both of their albums to date,[13][14] and toured with the band.