Giuseppe Verdi , who died 100 years ago this month, is widely acknowledged not only as one of the greatest masters of opera, but also as a supreme dramatist. In a new series opera critic Rodney Milnes talks to leading British singers, conductors and producers about the special pleasures and challenges of performing Verdi. Today he talks to conductor Mark Elder about the dark horse of Verdi's mature masterpieces, Simon Boccanegra. Brian Kay - Music: page 41