More than many of his peers and others of his ilk further afield, Cork songsmith John Blek is a master of subtlety in realms of folk-informed pop. Set for release on October 6, his third studio album, Catharsis Vol. 1, is a release that – as its title duly attests – stems from some personal hardship. Speaking of the release, Blek said: “I spent much of the early part of 2017 in and out of hospital with some mysterious illness that was intent on wasting my now 30-year-old body. My energy was at an all-time low and all that gave me…