Glyndebourne festival A visual whirlwind accompanies charismatic and stylish performances in William Kentridge’s new staging. In the pit, Jonathan Cohen and the OAE add light and shade There is a lot to look at in Glyndebourne’s first production of Monteverdi’s L’Orfeo . Directed by William Kentridge with a set by Sabine Theunissen, this staging is rooted in an artist’s studio and borne along by objects and images. Some are three-dimensional, real-life: ladders, chairs, sketchbooks, a mid-centur