Crass hosted a guest show on 30 January 2018. Crass has been played on NTS over 80 times, featured on 72 episodes and was first played on 6 August 2014.

Crass were an English anarcho-punk band, formed in 1977 and based around Dial House, an open house community near Epping, Essex, England.

In contrast to the Sex Pistols 'anarchy', Crass' attitude was more directly influenced by libertarian socialist philosophy and anarchism's nineteenth century roots. In the process they promoted anarchism as a legitimate political ideology, way of living, and as a resistance movement, popularizing the seminal peace punk movement and touching on such overtly political issues…