With the aid of the notations, Sergeyev made what is perhaps his most substantial contribution to the art of ballet: at the invitation of Ninette de Valois, he restaged Petipa's "The Sleeping Beauty", "Giselle", the Petipa/Cecchetti "Coppélia" and "The Nutcracker" for the Vic-Wells Ballet of London, the precursor of the Royal Ballet, who still perform these ballets, if in edited form. In 1942 Sergeyev began staging classics for the International Ballet, a British touring company founded in 1941 by the ballerina Mona Inglesby, who offered to stage the productions as close as possible to Petipa's imperial stagings. When in 1946 the Sadler's Wells Ballet staged a new edited "Sleeping Beauty" [http://www.rohcollections.org.uk/production.aspx?production=798&row=1] to reopen the Royal Opera House, Sergeyev left to join Inglesby, remaining balletmaster with International Ballet until his death in 1951. His stagings for both British companies formed the nucleus of what is now known loosely as the "classical ballet repertory", and as a result these works went on to be staged all over the world in versions largely derived from the Vic-Wells Ballet's own productions.