There are horrors in the world so vile that few of us want to think about them. None more so than such cases as Josef Fritzl - or Jaycee Lee Dugard, or Arcedio Alvarez, or Raymond Gouardo, or Wolfgang Priklopil, or Marc Dutroux... but you get the picture. Cases where men abduct girls and turn them into sex slaves and father multiple children by them, often incestuously, hiding them in garages, basements, behind walls, sometimes for decades undiscovered, sometimes murdering them. Mostly you read that it happened, you shudder, and try not to think more about it.

Extraordinary lives dancers lead at Covent Garden - in a single day rushing between studios to rehearse the tortured, introspective Mayerling, the pristine classicism of The Sleeping Beauty, the off-centre acrobatics of Balanchine’s Agon and the static wriggles and hip-snaps of Wayne McGregor. All of these works are currently in Royal Ballet repertory, and you can see Ed Watson, Yuhui Choe, Johan Kobborg and an array of others on stage at the moment in all or any of these. But at what cost to communicating hugely different styles of choreography?