An influence on her socialist views was from time with Julia Dawson, on the Clarion Van in the West Midlands and she continued to see the need for women to be given the right to vote, as a class issue.

The League used this occasion as an opportunity for demonstrations and publicity:[4]The house, surrounded by a wall, could be reached only through an arched doorway, which Montefiore and her maid barred against the bailiffs.

"[7] In October of the same year, Adela Pankhurst, Montefiore and others were arrested for demanding votes for women in the lobby of the House of Commons.

[3] In October 1913, Montefiore was involved in a “holiday plan” to take the children of unionised workers locked out by employers in Dublin into the respite care of sympathetic families in England.

Archbishop of Dublin William Joseph Walsh, wrote a public letter condemning the plan as dangerous to the children's Catholic faith.

[14] During the First World War, Montefiore volunteered in France but also joined the British Socialist Party, and contributed articles to The Call.

When Montefiore's son died in 1921 from the effects of mustard gas poisoning acquired during his service in the War, the Australian government would not allow her to visit Australia until Holman spoke on her behalf and assured them that she promised not to engage in communist propaganda.

[2] Montefiore was allowed to visit, and also used the time to make connections in the Australian communist movement, meeting Christian Jollie Smith.

[7] Her name and picture (and those of 58 other women's suffrage supporters) are on the plinth of the statue of Millicent Fawcett in Parliament Square, London, unveiled in 2018.