The scan will give a good indication of the condition of the item. I combine postage. If you purchase more than one item please wait for an invoice with the correct postage. 
Signatures as follows:
Ninette de Valois
Constant Lambert
Frederick Ashton - 2
June Brae
Richard Ellis
Margot Fonteyn - 3
Robert Helpmann - 4
Mary Honer - 5
Pamela May - 2
Joy Newton
Claude Newman
Michael Somes - 2
Harold Turner - 2
Julia Farren 
Guinivere Parry
I believe the book was the property of a dresser or costume person in the ballet. her name and address neatly written on the front free endpaper.