Lightbulb-wreathed mirrors, wigs and makeup artists, a sense of faded glamour: the backstage dressing room has its very own lore in Theatreland. It is a private space for a company of actors to gear up or wind down, in between slipping into character, but it’s so much more than that. Films such as All About Eve and John Cassavetes’s Opening Night, as well as plays such as Ronald Harwood’s The Dresser, show this space bristling with tension, vulnerability and rivalries. And Judi Dench has spoken about the fun to be had in this other, unseen side of the proscenium arch...