Ordinarily, if a podcast purports to be revelatory, you can assume it is anything but. There’s a glut of programmes at the moment featuring interviewer and interviewee locked in passionate heart-to-hearts in which a few, carefully selected beans are spilled to no real consequence or effect. The Last Bohemians makes no claim to shatter the earth with secrets, but the guests are so unguarded that the episodes possess that longed-for bite.