In December 1919, the first woman took her seat in the British parliament. Her name was Lady Nancy Astor and she had been born in America. Witness History listens back through the BBC archives, and talks to her grandson David Astor about his memories of her.

(Photo:American-born Nancy Witcher Langhorne, or Viscountess Astor, at the declaration of the poll in Plymouth which made her Britain's first woman member of parliament. Credit: Topical Press Agency/Getty Images)