There are certain operas such as Purcell’s Dido and Aeneas and Handel’s Radamisto where one will forgive the odd piece of clunky or prosaic direction if the musical credentials underpinning the evening are strong. There are other pieces, however, such as Ravel’s L’heure espagnole and Shostakovich’s The Nose where, if the staging is not slick from start to finish, the evening is almost wholly undermined. There is actually something unfair about this, because it...