Would you believe it? I haven’t seen a single production of Xerxes for almost two years! It’s a wonder I haven’t had withdrawal symptoms. Unsurprisingly, I leaped at the chance to see Cavalli’s version of this fabulous story performed by Ensemble OrQuesta, as part of this year’s Grimeborn festival. Unlike most of the audience, I suspect, I’d actually seen Cavalli’s rare opera before, in a superb semi-staged performance in Vienna back in 2015, and so the bar was high. But it turned out that the OrQuesta show was actually a fascinating complement, not a rival, to the Vienna production, for reasons I’ll explain in a minute. Very simply staged, with costumes in sombre shades of black, and with a stunning silver-wire tree as the only prop, it was a pared-down, effective performance of a seldom-seen opera – and a welcome introduction to some exciting young singers.