The political background in Britain, and the impending passing of the Criminal Justice Act into statute paved the way for a series of politically influenced artists such as The Levellers, The Prodigy, Dreadzone, and Pop Will Eat Itself, and Senser fit into that group with a blend of aggressive hip-hop, thrash metal and psychedelic ambience.
The Levellers hoped to base England's new constitution on the Agreement of the People, but in the end, the New Model Army based their demands on an alternative less revolutionary document, the Heads of Proposals, that was proposed and supported by the Grandees (senior officers) of the Army.
Johnstone also heads the popular all-star musical festival act,"The Fabulous Good Time Party Boys", which features members of the Levellers, Irish singer/songwriter Dan Donnelly, American musician Roy Harter, and two of his children, Alex Johnstone and Emily Johnstone.