“The escalating artistic arms race between London’s two rival opera houses, Covent Garden and the Coliseum, reached a new level of threat this weekend. Both venues are in the middle of staging block-busting versions of Richard Wagner’s epic and expensive Ring cycle, but audiences at the Coliseum last night were left reeling from more than the music after the English National Opera mounted a violent coup de thétre. In what will come to be regarded by opera fans as a moment of bizarre heresy – or of creative triumph – Brunnhilde, the leading character in the ENO’s new production of Wagner’s Twilight of the Gods, was portrayed as a suicide bomber.”