following this, henry returned to the united states; and geoff dean contracted tuberculosis to be replaced by andy petre (born andrew charles malcolm glywn petre). that april, the instrumental single "soul sauce" / "i wish i could jerk like my uncle cyril" was released. mike patto then joined the band, and took on a prominent role as vocalist and songwriter. when petre quit, the drum stool was filled by john halsey (born 23 february 1945, highgate, north london).