Penetration singer Pauline Murray and the Invisible Girls, John Cooper Clarke's backing band. Alongside core members Martin Hannett on bass and record production, Steve Hopkins on keyboards and Paul Burgess on drums, the band included several musicians from other Manchester bands: The Durutti Column's Vini Reilly and Dave Rowbotham on guitar, John Maher from Buzzcocks on drums, Dave Hassell on percussion and Murray's boyfriend Robert Blamire on bass. Like Murray, Blamire had been a member of Penetration until it dissolved in late 1979. With Blamire in the band, Hannett moved from bass to keyboards.