This opera was a personal triumph for Dame Janet. As Caesar, she arms the voice with an impregnable firmness, outgoing and adventurous. Valerie Masterson shares the honours with Dame Janet, a Cleopatra whose bright voice gains humanity through ordeal. The tinkle of surface- wear clears delightfully in her later arias, sung with a pure tone and high accomplishment. As a total production, Julius Caesar was an outstanding achievement in ENO's history. Strongly cast, it had a noble Cornelia in Sarah Walker, a high-spirited Sesto in Della Jones, and in James Bowman a Ptolemy whose only fault was that his voice lacked meanness of timbre appropriate to the odious character. John Tomlinson's massive bass also commands attention. Mackerras's conducting is impeccable and the opera is given in clear, creditable English.