You need very little for a Swan Lake. Tchaikovsky’s music, white swan-girls, a mooning boy, and 32 fouettés for the ballerina in black. That's about it, isn't it? Every traditional Swan Lake we see now is a sort of balletic pizza - a musical base scattered with ingredients collected from a familiar buffet, piled up by its stager or so-called choreographer according to taste (and often a large measure of vanity for sauce).

It is a curious feeling to go to meet a hated figure and find a delicate, blonde girl with a sweet face.

On Monday, 23-year-old ballerina Alina Somova opens the batting for the legendary Mariinsky Ballet’s Covent Garden tour in Romeo and Juliet, needing to defy her critics who line up from West to East accusing her of vulgarising the majestic, poised St Petersburg style that defines classical ballet worldwide.

If you tell a tall, whisper-slim young woman of 31 that she has been described as "the soul of Russia", it is understandable that she looks startled. Two huge, smoke-grey eyes cast a doubtful glance at me, and she murmurs in Russian. Her translator announces: "That is a very serious declaration."