The band hired Midlands bassist/vocalist Glenn Hughes, formerly of Trapeze. According to Paice, Glover told him and Lord a few months before his official termination that he wanted to leave the band, so they had started to drop in on Trapeze shows. After acquiring Hughes, they debated continuing as a four-piece, with Hughes as bassist and lead vocalist. According to Hughes, he was persuaded because the band was bringing in Paul Rodgers of Free as a co-lead vocalist, but by that time Rodgers had just started Bad Company. "They did ask", Rodgers recalled, "and I spoke to all of them at length about the possibility. Purple had toured Australia with Free's final lineup. I didn't do it because I was very much into the idea of forming Bad Company." Instead, auditions were held for lead vocal replacements. They settled on David Coverdale, an unknown singer from Saltburn in north-east England, primarily because Blackmore liked his masculine, blues-tinged voice.