Initially highly religious, she changed her views as a result of World War I, and through attending National Council of Labour Colleges lectures led by T. A. Jackson.
She lost her teaching post the following year, when she became pregnant, and moved with Ernest to Moscow in 1924, returning just before the UK general strike.
[2] Brown became extremely active in the British Aid for Spain movement, playing a central role in the cross-party National Joint Committee for Spanish Relief.
[3] Late in 1930s, Brown became the national women's organiser for the CPGB, and she stood in the 1940 Bow and Bromley by-election, taking only 4.2% of the vote even though she faced only one opponent.
[2] Despite increasingly poor health, Brown continued to speak on behalf of the CPGB, teach and attend conferences until her death in 1984.