“By reputation, Kenneth MacMillan was the dark genius of British ballet – its destroyer, if you listen to some. They think this country’s classical ballet reached its pinnacle under the Apollonian hand of Frederick Ashton, before MacMillan stomped in with his working-class neuroses and rape simulations and took ballet down to the psychological underworld.” Ismene Brown looks at his body of work – especially the little-performed short ballets – in this 25th anniversary year of his death.