Looking up and looking out – that’s what I remember from a behind-the-scenes tour at the National Theatre. Just days before, I had watched War Horse, here and now, I was gazing up at its eponymous hero Joey, hanging on a wall at the edge of the stage. Seeing this exquisite horse puppet, all 60kg of it, in its ‘resting’, inanimate state brought home the creative magic of the performance. A creature that had bristled with life on stage – snorting, whinnying, galloping – was a structure of cane, metal and fabric, now hung up like weekday washing, just out of view of the audience. Joey wasn’t the only prop neatly stored. More horses slept there, rifles and farm tools were stacked up and high above our heads, suspended from…