'So let's build the tension – everybody put your hands on your legs and give us a drum roll please! Stamp your feet! Here we go!'It's the final performance of a Cinderella panto in a moth-eaten, regional theatre, and backstage tensions between the ugly sisters are threatening to boil over on to the stage. Will the egotism, one-upmanship and sexual politics remain confined to the dressing room, or will the bitter rivalry and jealousy between the two actors steal the show?Oh No It Isn't! is a brilliantly observed, raucous yet moving new play exploring the highs and lows of life in the theatre.