Does anyone remember how Wolfmother was tipped to be the “saviour of rock n roll” about ten years ago? How they were supposed to recapture the debauchery and majesty of the halcyon days of Tony Iommi, Jimmy Page and Angus Young and take rock music back from chic indie kids. While their self-titled debut was an enjoyable romp with real barnstormers on display, by the time their follow-up rolled around the band had all but lost their momentum and stardom. You can point to a few reasons for this: loss of two-thirds of the band in between the first and…