Baroque opera shows vicious people can sometimes be happy — and we’re glad they are

Visits by English Touring Opera are always to be looked forward to, but this autumn it has surpassed itself with three baroque works, two of them masterpieces and the third a fascinating rarity, all performed by casts of astonishingly high calibre, and produced helpfully, resourcefully, with simple elegant sets, which are all that is needed, though they probably cost a thousandth as much as the eye-catching splurges that we often see in London.