Black Swan stars Natalie Portman as a ballerina hitting the big time. How realistic is the movie? We asked the cream of British ballet to give their verdictsBlack Swan, directed by Darren Aronofsky, claims to penetrate to the romantic, obsessional heart of ballet. Based loosely on Swan Lake, the film follows Nina, its ballerina heroine, as she grapples with learning the dual role of Odette and Odile (the white and bl…
