Ian Gillan band, who had not had any holiday since their initial rehearsals at Hanwell. He started drinking, and relationships between him and the rest of the band became strained, particularly with Blackmore. On 6 November 1971, he collapsed with hepatitis while waiting to board a plane in Chicago, cancelling the remainder of a US tour. By December 1972, having recorded "Machine Head", "Made in Japan" and the yet to be released "Who Do We Think We Are" with Deep Purple, Gillan finally decided the workload had driven him to exhaustion. Unlike some band members, he was unhappy about "Made in Japan",
Ian Gillan performing to pursue various unsuccessful business ventures. These included a £300,000 investment in a hotel near Oxford. A second was the Mantis Motor Cycles project, which suffered from the collapse of the British motorcycle industry in the mid-1970s, culminating in Gillan being forced to file for liquidation. A more successful opportunity, however, came with his investment in Kingsway Studios in 1974, This led to a live performance at the Butterfly Ball on 16 October 1974, replacing Ronnie James Dio at the last minute. In 1975, Gillan formed the Ian Gillan Band with guitarist Ray Fenwick, keyboardist Mike Moran, quickly replaced