1913: the last long summer before the war. The country is gripped by suffragette fever. These impassioned crusaders have their admirers; some agree with their aims if not their forceful methods, while others are aghast at the thought of giving any female a vote.

Meanwhile, hundreds of women are stepping out on to the streets of Britain. They are the suffragists: non-militant campaigners for the vote, on an astonishing six-week protest march they call the Great Pilgrimage. Rich and poor, young and old, they defy convention, risking jobs, family relationships and even their lives to persuade the country to listen to them.

This is a story of ordinary people effecting extraordinary change. By turns dangerous, exhausting and exhilarating, the Great Pilgrimage transformed the personal and political lives of women in Britain for ever.