Presented by Petroc Trelawny. The In Tune A-Z of opera reaches its climax in today's programme. One of the great international stars of opera, Placido Domingo has taken time out of rehearsals of Verdi's Simon Boccanegra to speak about his operatic 'Z' - Zarzuela, the light Spanish opera style he grew up with. Plus Don Giovanni at Holland Park and harpsichordist Trevor Pinnock. Main news headlines are at 5.00 and 6.00 E-mail: [email protected].