(Photo: ©Tristram Kenton) English National Opera haven’t had a live audience in their home at the London Coliseum since March 2020. But they’ve hardly been idle: their costume department made hospital scrubs, they devised a singing program for those suffering with “long COVID,” and performed “Tosca” and “La bohème” in striking outdoor settings. Their 2021-22 season opened last week with {…}