Endorphin-rush rock'n'roll: remastered, relentless, essentialAs Zeppelin fans of all creeds and nations prepare to make the pilgrimage to London’s O2 arena on 26 November, it may not have escaped their notice that the reunited, hot-ticket, must-see Zep are about to attempt something truly precarious. Never mind Valhalla, consider Guernica. Watched by 20,000 people, three men aged 63, 61 and 59 will endeavour to lend the requisite fury and intensity to songs that are now closer historically to the Spanish Civil War than to 2007.
