Christabel Pankhurst: 'I wanted to assault a policeman'
9 February 2012 Last updated at 16:15 GMT
In 1903 the Women's Social and Political Union was formed in Manchester by political activist Emmeline Pankhurst and her daughter, Christabel.
It was the leading militant organisation campaigning for the right for women to vote.
Andrew Marr reports on the start of the struggle for women's suffrage.
Andrew Marr's The Making of Modern Britain was first broadcast on 28 October, 2009.