
- 1908: Margaret joined the Women’s Social and Political Union, fighting for gaining the right for women to vote.
- 1913: She was sent to prison for a month, after setting a Royal Mail letterbox alight in Newport, but was released after a few days after going on hunger strike.
- 1915: Margaret travelled on the RMS 'Lusitania' when the ship was sunk by a torpedo.
- 1918: She became the Chief Controller of Women’s Recruitment in the Ministry of National Service based in London.
- 1918: She became 2nd Viscountess Rhondda.
- 1919: She was a Member of the Board of 33 businesses and chaired 7 of them.
- 1920: Margaret established the weekly newspaper 'Time and Tide'.
- 1921–24: She was the National President of the Women Citizens’ Association.
- 1926: Margaret was elected the first female President of the Institute of Directors, a position she held for a decade.
- 1933: She published her memoir, 'This Was My World'.
- 1955: She received an Honorary Doctorate from the University of Wales.
- 2019: She was selected as one of five historical women to be memorialised in Wales by a statue.
‘In the 1920s she was one of the leading figures in the fight for women under thirty to receive the vote.’ – Angela V. John, ‘Turning the Tide: The life of Lady Rhondda’ (Parthian 2013), p. 16