28/03/2020 GMT

To mark International Women's day, Witness History brings you an all women special. We'll go back 50 years to hear from the first black woman to become a head teacher in London, and go to Russia for an eyewitness account of Stalin's final terrifying purge in the Soviet Union. We head to the 1970s, and hear the story of the South Asian women who galvanised Britain's trade union movement to support their strike, and speak to Carmen Callil the founder of Virago Press, who looks back on her life in publishing.