She was the first of three children born to the suffragist Eleanor Margaret and Francis Plumptre Beresford Osmaston.

She also joined the Fabian Society, captained the cricket team, played piano and studied history and economics.

[3] She took to public speaking in 1913 during the Great Pilgrimage as suffrage supporters travelled from across the UK to meet in Hyde Park on 26 July.

[1] Her husband was an active member of the Liberal Party but Dorothy refused to join until 1918 because of their poor support for the suffrage cause.

Lloyd George considered her the more radical member of their marriage and their house did not have alcoholic drinks because of her objection to them.