Disney’s Sister Suffragette: how Glynis Johns made Mrs Banks the feminist heart of Mary Poppins

The campaign for women’s votes may be one of the most significant events in modern history, yet few popular films have tackled it. There were films about suffrage during the silent era, while the battle was still being fought, but after women got the vote it was as if the battle was too obvious a cause to be worth celebrating – or perhaps too shameful a blot on history.