André Previn's first opera, 'A Streetcar Named Desire', is an intelligent adaptation of Tennessee Williams' play, written to be performed by two very strong principals. Renée Fleming's performance as Blanche Dubois is one of the best things she has done, full of a dangerous bravado and a vulnerability that wins us despite our irritation. The role is one which gives her voice ample opportunity both for extended displays of controlled, passionate singing and for those moments when singing by itself is enough and the voice has to break off in sorrow or madness. Rodney Gilfrey as Stanley Kowalski is equally fine - his voice has the right dangerous energy. In the important subsidiary roles of Stella and Mitch, Elizabeth Futral and Anthony Dean Griffey are also remarkable. Futral in particular gives a total performance in which we forget to make a distinction between her acting and her singing. The opera itself is, as you would expect, one of the most accessible new scores to arrive on the opera stage for some years, drawing heavily on the legacy of jazz and with that nervous musical intensity we associate with the play. Previn conducts the San Francisco Opera Orchestra effectively.