A choreographer for this ballet company created a ballet that starts and ends with a funeral, in which the male lead threatens a woman with a skull and pistol and dances seven pas de deux, with one ending in a hunting lodge. Crown Prince Rudolf and Mary Vetsera commit suicide in that ballet premiered by this company, Mayerling. A choreographer for this company added a clog dance with the Widow Simone while farmers dance around a maypole to a ballet in which eight women dance with eight ribbons, La fille mal (-5[1])gardée. Ninette de Valois (val-WAH) was the first director of this company, whose prima ballerinas included Alicia Markova and (10[1])Margot (10[1])Fonteyn. Kenneth MacMillan and Frederick Ashton were principal choreographers for this ballet company. For 10 points, name this UK ballet company (10[1])chartered by Queen (10[1])Elizabeth (10[1]0[1])II. (10[3])■END■