“The artistic power of cinema has had beneficial effects on theatre – in, for example, a greater economy and fluidity in writing and staging – but the dark side has been that stage productions now seem to be apologising for not being films, like someone changing their appearance to look like a rival in love. Modern art has encouraged the use of ‘mixed media’, but the extended use of video in theatre always feels like a defeat. The point of theatre is that the performance is created as we watch.”