It’s Act Three of Emma Rice’s new production of Offenbach’s Orpheus in the Underworld, and Eurydice (Mary Bevan) is trapped in the backroom of a Soho peep show. But that doesn’t really matter because Jupiter (Willard White), a cigar-toking love walrus in a silk bathrobe, has transformed himself into a fly and is about to ravish her, once he’s worked out the practicalities of doing so while three millimetres long.