Everything you first see says cinema: the usherettes with torches, the faded plush-and-gilt splendour of the auditorium, the slightly altered BBFC certificate declaring Brief Encounter, 'suitable for the incurably romantic'. But this, as the marquee insists, is 'Not the film!' and not-the-film is what Knee-high Theatre serves up, always entertainingly, often delectably, sometimes sublimely.