During 1970 he released the solo album Mona – The Carnivorous Circus, which also featured Steve Peregrin Took, John Gustafson and Paul Buckmaster, before ending his music business to concentrate on writing.

[5] He also contributed song ideas and music for short-lived Ladbroke Grove ensemble Warsaw Pakt's 1977 Needle Time LP.

and Death Tongue, Jack Lancaster on The Deathray Tapes and Andy Colquhoun on The Deviants albums Eating Jello With a Heated Fork and Dr. Crow.

During the early 1970s he contributed to the UK Underground press such as the International Times, also establishing Nasty Tales which he successfully defended from an obscenity charge.

He has long been associated with the Hells Angels (UK), who provided security at Phun City; they even awarded Farren an "approval patch" in 1970 for use on his first solo album Mona.