The shining sonic arc of a soprano voice in full flight cuts through the air in a Tower Hamlets backstreet. The Cotswold-based Longborough Festival Opera team has come here to rehearse its new production of Tristan und Isolde, which opens on 12 June. Anthony Negus, Longborough’s expert Wagnerian music director, is conducting, ratcheting up the intensity; and in a sunny studio with seated cast and piano accompaniment, the sound is overwhelming as Isolde – Rachel Nicholls – lets rip.
Tristan und Isolde, Longborough Festival Opera, from 12 June. Box office: 01451 830 292