Twenty three years ago Vivian Stanshall died in a fire, trapped in a north London flat. Drunk, he slept through his own death. Vivian was the ineffable, unflappable, elegant and irreverently funny frontman and songwriter for the Bonzo Dog Dada Band, a group of art students who'd created a band unlike any other band one could name - and still adored by thousands long after their short time in the sun was knocked on the head by Vivian himself. "We were...