So we all know by now that Van Morrison will be performing Astral Weeks live on Friday and Saturday at the Hollywood Bowl. Which even sounds bizarre as I write it. His reasons? “In the 60′s and 70′s the record companies did not support the music, so I never got to take these songs on tour, and I certainly did not have the money to do it.” Fine, and of course Van Morrison can do with Astral Weeks and the songs thereon whatever he likes. But. The concerts are to be recorded live and released as Astral Weeks Live At The Hollywood Bowl. Even the title makes me shudder.  I know I should reserve judgment and wait to see if any magic is produced on the nights involved. But I’m not. Anyone else (apart from Sean O’Hagan) unsteadied at the thought?